Article
Construction & Building Technology
Vittoria Grilli, Amedeo Virgili, Andrea Graziani
Summary: In this study, laboratory experiments were conducted to characterize the complex modulus and fatigue properties of cold recycled materials mixtures with cement bitumen treatment. The results showed that the stiffness modulus values of small specimens were approximately 15% lower compared to the large specimens.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Sabine Vassaux, Marine Havel, Didier Lesueur, Julien Van Rompu, Flavien Geisler, Simon Pouget
Summary: The study assesses the blending of reclaimed asphalt pavement (RAP) and new binder using infrared microscopy, and finds that the homogeneity of the binder depends on the RAP content and virgin binder. Infrared data in cold mixes evolve over time, indicating emulsion curing.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Muna Al-Kafaji, Shakir Al-Busaltan, Hussein A. Ewadh
Summary: The study on modified CBEM mixtures indicates that adding ordinary portland cement and acrylic polymer can improve water damage resistance. The CBEM with a mix of OPC and 1.25% AR performs the best, showing better performance compared to HMA and OPC-only CBEM in terms of resistance.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Muna Al-Kafaji, Shakir Al-Busaltan, Mustafa Amoori Kadhim, Anmar Dulaimi, Behrooz Saghafi, Hayder Al Hawesah
Summary: Cold mix asphalt (CMA) is an environmentally friendly alternative to traditional hot mix asphalt (HMA), with cold bitumen emulsion mixture (CBEM) being a standout option. This study focuses on enhancing CBEM properties through low-energy heating and the addition of an acrylic polymer. The research demonstrates that CBEM samples containing 2.5% acrylic polymer and active filler exhibit the highest crack resistance and significant improvements in volumetric and mechanical properties.
Article
Materials Science, Characterization & Testing
Mitra Ebrahimi, Ali Akbar Safari Sinegani, Mohammad Reza Sarikhani, Nasser Aliasgharzad
Summary: In response to the environmental impact of the transport sector, sustainable technologies have been adopted to reduce greenhouse gas emissions and energy consumption. Bitumen emulsion, particularly in cold mix technology, has gained popularity in pavement construction due to its ability to eliminate heating and reduce carbon emissions. The study focuses on the role of filler materials, such as cement, lime, and fly ash, in forming bonds between bitumen emulsion and aggregate in cold bituminous emulsion mixtures (CBEMs). The use of cement and fly ash results in higher density and stability due to their pozzolanic nature and hydration properties.
JOURNAL OF TESTING AND EVALUATION
(2023)
Review
Construction & Building Technology
Bhuvana Priya Dhandapani, Ramya Sri Mullapudi
Summary: Cement grouted bituminous mix (CGBM) is a type of pavement surfacing that combines porous asphalt mixtures and cementitious grouting material. It has gained attention due to its advantages over flexible and rigid pavement. Researchers have conducted various laboratory and field studies on CGB mixes, exploring the effects of aggregate gradation, binder type, and composition of grouting materials on the mechanical properties and performance characteristics of CGB mixes, as well as the micro-mechanical analysis of CGBM and the impact of reclaimed asphalt pavement (RAP).
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Kabiru Rogo Usman, Mohd Rosli Hainin, Mohd Khairul Idham Mohd Satar, Muhammad Naqiuddin Mohd Warid, Siti Nur Naqiba Kamarudin, Suleiman Abdulrahman
Summary: The study demonstrated that the addition of POFA in fast-curing cold mix asphalt significantly improves Marshall volumetric properties, as well as enhances tensile strength, dynamic creep, resistance to cracking, and moisture damage in CMA. POFA waste serves as a good pozzolanic filler, reducing the void content in CMA. The incorporation of POFA results in increased early strength and durability of CMA mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Pejoohan Tavassoti, Mansour Solaimanian, Xuan Chen
Summary: Cold recycling of pavements uses reclaimed asphalt pavement (RAP) for pavement rehabilitation. This study assessed the fatigue performance of three different cold recycled asphalt mixes, and found that adding 1% Portland cement significantly improved their fatigue resistance. The study also demonstrated the potential of using polymer modified emulsion to enhance the rutting resistance of the mixes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Characterization & Testing
William Fedrigo, Thais Raduenz Kleinert, Washington Peres Nunez, Angela Gaio Graef, Luiz Carlos Pinto Da Silva Filho, Lelio Antonio Teixeira Brito
Summary: This research focuses on the shrinkage issue of cold recycled cement-treated mixtures. The effects of cement and reclaimed asphalt pavement (RAP) contents, as well as curing time, on the shrinkage of these mixtures were evaluated. The results suggest that finer mixtures have higher shrinkage potential, while coarser mixtures tend to shrink less. Increasing RAP contents can help reduce the shrinkage of finer mixtures. Shrinkage increases with time, especially in the early stages, emphasizing the importance of moisture preservation. Cement content has a minor impact on shrinkage, contradicting the practice of using low cement contents to reduce shrinkage hazards.
JOURNAL OF TESTING AND EVALUATION
(2023)
Article
Construction & Building Technology
Zedong Zhao, Siyuan Wang, Jiaolong Ren, Yi Wang, Chunguang Wang
Summary: This study revealed the effects of RA content, RA composition, and stress level on the fatigue life of the CSCRM using CMM with pure cement through 40 sets of splitting fatigue tests. A fatigue equation considering RA content, RA composition, and stress level was established to predict the fatigue life of the CSCRM under different cement contents.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Construction & Building Technology
Deepak Prasad, Bhupendra Singh, Sanjeev Kumar Suman
Summary: This paper discusses the utilization of recycled concrete aggregates (RCA) in bituminous mixes, including different stages and treatment methods. The paper also explores the characteristics of RCA and their impact on the performance of bituminous mixes, as well as approaches for enhancing the physical properties of RCA and the performance of bituminous mixes incorporating RCA.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Wenting Yang, Jian Ouyang, Yan Meng, Baoguo Han, Yuqi Sha
Summary: Cold-recycled mixture with asphalt emulsion (CMAE) is widely used in pavement rehabilitation for its environmental and economic advantages. The study found that single curing is beneficial for CMAE with low cement content, while mixed curing is more effective for CMAE with high cement content. Increasing compaction blows and utilizing double compaction can improve the mechanical properties of CMAE.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Lukasz Skotnicki, Jaroslaw Kuzniewski, Antoni Szydlo
Summary: This article discusses selected issues related to cracking in MCE mixtures, with researchers focusing on reducing the cracking phenomenon by using an innovative cement binder made from dusty by-products from cement plants, which also contributes to the optimization of the recycling process in road surfaces. The study found that the innovative binders can help reduce stiffness and cracking in MCE mixes, ultimately improving the durability of road pavements.
Article
Materials Science, Characterization & Testing
Chiara Mignini, Amedeo Virgili, Andrea Graziani
Summary: This research investigates the effect of different composition factors on the densification behavior of CRAMs. A new empirical modeling approach is proposed to analyze the densification curves and determine the grading distribution as the main controlling parameter.
JOURNAL OF TESTING AND EVALUATION
(2022)
Article
Construction & Building Technology
Pablo Orosa, Ignacio Perez, Ana R. Pasandin, John E. Haddock
Summary: This study evaluates the effects of adding 1% Portland cement or 1% hydrated lime on the compactability and volumetric properties of 100% reclaimed asphalt pavement and bitumen emulsion Cold Recycled Mixtures (CRM). Dynamic triaxial tests were conducted to determine the influence of these active filler additions on the resilient modulus (Mr) of the mixtures. The results showed increased Mr values at lower temperatures and reduced stress dependencies for all mixtures, with cement addition improving compactability and hydrated lime addition resulting in greater increases in Mr and reduced stress dependencies. The results were analyzed using the Stress-Temperature Superposition Principle (STSP) for simpler and more straightforward analysis.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Marcin Stienss, Cezary Szydlowski
Article
Chemistry, Physical
Piotr Jaskula, Jerzy Ejsmont, Marcin Stienss, Grzegorz Ronowski, Cezary Szydlowski, Beata Swieczko-Zurek, Dawid Rys
Article
Construction & Building Technology
P. Jaskula, D. Rys, C. Szydlowski, M. Stienss, L. Mejlun, M. Jaczewski, G. Ronowski
Summary: Poroelastic mixtures have high porosity and flexibility, desirable for noise reduction but come with increased risk of debonding. Research found that softer bitumen for tack coat and milled texture of lower layer improve bonding quality, with proper compaction having the major influence. Technological imperfections have a greater impact on poroelastic mixtures compared to standard asphalt mixtures.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Chemistry, Physical
Piotr Jaskula, Dawid Rys, Marcin Stienss, Cezary Szydlowski, Michal Golos, Jacek Kawalec
Summary: This study investigated a novel approach to reinforce asphalt layers using a new type of geogrid composite, showing that these materials have a positive effect on pavement performance and potential to extend the overall pavement life, especially in the case of hexagonal grid.
Article
Construction & Building Technology
Dawid Rys, Mariusz Jaczewski, Marek Pszczola, Agnieszka Kamedulska, Bartosz Kamedulski
Summary: Accurate identification of factors influencing low-temperature cracking is crucial for material selection and pavement maintenance planning. A study on 68 road sections found that pavement age, type of asphalt concrete, modification of bitumen, and climatic zone have the greatest impact on low-temperature cracking. Using polymer-modified bitumen can significantly reduce the odds of cracking. Quality of paving works and bitumen chemistry may also be critical factors.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Engineering, Mechanical
Cezary Szydlowski, Lukasz Smakosz, Marcin Stienss, Jaroslaw Gorski
Summary: This work presents a comprehensive laboratory testing of semi-circular bending of asphalt concrete samples, with the results showing significant scatter in force-deflection histories. A simulation-based fictitious Monte Carlo material model is introduced to reflect the random nature of the samples. The proposed computational algorithm with a two-phase material model is validated through comparison with laboratory data.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Mariusz Jaczewski, Cezary Szydlowski, Bohdan Dolzycki
Summary: This publication presents a methodology developed for determining linear viscoelasticity limits in cold recycled mixtures, which has been verified to be effective for testing base course cold recycled mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Piotr Jaskula, Jerzy A. Ejsmont, Wladyslaw Gardziejczyk, Piotr Mioduszewski, Marcin Stienss, Marek Motylewicz, Cezary Szydlowski, Pawel Gierasimiuk, Dawid Rys, Marta Wasilewska
Summary: This article describes the development process of designing and testing poroelastic pavement using highly polymer-modified bitumen. Unlike previous trials, the poroelastic wearing course in this study was composed of mineral and rubber aggregate mixed with highly polymer-modified bitumen instead of polyurethane resins. The laboratory and field tests were conducted to determine the proper composition for the poroelastic mixture and evaluate its performance. While the durability of the poroelastic wearing course remained a challenge, the issue of premature debonding from the base layer was successfully resolved. The experience gained from this research will guide future attempts to develop a more durable poroelastic mixture.
Article
Construction & Building Technology
P. Jaskula, D. Rys, M. Stienns, C. Szydlowski, M. Golos, K. Kornacka, J. Zoltko, J. Kawalec
Summary: This study explores the impact of a multiaxial geocomposite made of polypropylene geogrid and non-woven fabric on the delay of crack propagation. The research conducted four-point bending tests on large asphalt concrete beams, examining both reinforced and non-reinforced specimens. Multiple approaches were employed, including analysis of stiffness modulus decrease and crack propagation through dissipated energy. The study also investigated the effect of reinforcement on inter-layer bond shear resistance. The reinforced system demonstrated reduced stiffness decrease during cyclic loading, enabling it to withstand loads for a longer period compared to the unreinforced system. The addition of reinforcement also resulted in a potential 10-22 times increase in fatigue life and a 5-10 times increase in the number of cycles to the first initiation of crack in the lower asphalt layer.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Mariusz Jaczewski, Marek Pszczola, Jacek Alenowicz, Dawid Rys, Bohdan Dolzycki, Piotr Jaskula
Summary: This paper determines the probability of thermal cracking in asphalt mixtures with different levels of reclaimed asphalt pavement (RAP) by conducting laboratory tests and using the thermal stress development method. The probability calculation takes into account the type and gradation of the mixture, as well as the quality and content of RAP. Two models, elastic and viscoelastic, are used to determine the thermal stresses. The addition of RAP decreases the low-temperature properties of all tested asphalt mixtures, but the cracking temperature can be increased by around 5-6 degrees Celsius with the addition of 20% RAP in the wearing and binder courses.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Mariusz Jaczewski, Cezary Szydlowski, Bohdan Dolzycki
Summary: Stiffness modulus is a crucial property for evaluating the usability of cold-recycled mixtures (CRM) in road pavement structures. This study investigates the impact of the selected target horizontal deformation level on the stiffness modulus values using the Indirect Tensile Stiffness Modulus (ITSM) test on cylindrical specimens. The research demonstrates that CRMs do not exhibit linear viscoelastic behavior and are prone to failure even under typical test conditions. Furthermore, CRM mixtures exhibit distinct rheological behavior compared to cement concrete or asphalt concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Physical
Marek Pszczola, Dawid Rys, Mariusz Jaczewski
Summary: This paper evaluates the impact of using high modulus asphalt concrete on the risk of low-temperature cracking on road pavements. The study finds that the number of low-temperature cracks is influenced by various random factors and the concept of reversion to the mean should be considered. A new factor, the Increase in Cracking Index, is developed to analyze pavement resistance to low-temperature cracking. Laboratory tests on asphalt samples from different layers and analysis of correlations between temperature and cryogenic stresses with field observation of cracking intensity are conducted. Practical suggestions for pavement designers are provided.
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
