Article
Construction & Building Technology
Jun Ren, Xianfeng Wang, Shengye Xu, Qiling Luo, Yunhui Fang, Jihua Zhu, Feng Xing
Summary: This study systematically investigated the effects of two typical superplasticisers on the hydrated characteristics and hardened properties of seawater-blended cement, revealing that the incorporation of superplasticisers slightly increases water film thickness, seawater enhances hydration heat and densifies microstructures, and compressive strength decreases due to the increase in capillary pores induced by superplasticisers.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Pawel Sikora, Sang-Yeop Chung, Maxime Liard, Didier Lootens, Tobias Dorn, Paul H. Kamm, Dietmar Stephan, Mohamed Abd Elrahman
Summary: The study demonstrates the significant influence of nanosilica on the hydration, rheological, mechanical, and transport properties of printable mortars, accelerating setting and hardening while improving compressive strength and pore structure. Increasing nanosilica dosage results in higher yield stress and reduced open time of mortar. Incorporation of nanosilica also enhances transport properties and buildability, leading to improved overall performance of 3D printed mortars.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Leo Gu Li, Yi Ouyang, Pui-Lam Ng, Kai-long Zeng, Albert Kwok Hung Kwan
Summary: In fiber-reinforced mortar, the length of fibers indirectly affects the packing density and water film thickness, while directly influencing the interaction between fibers and mortar. The water film thickness also plays a key role in the fresh properties of mortar, affecting its flowability, adhesiveness, and applicability.
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2021)
Article
Chemistry, Physical
Zhao Zhang, Qingge Feng, Weiwei Zhu, Xianhao Lin, Kao Chen, Wuxiao Yin, Changhai Lu
Summary: Previous studies have shown that water film thickness (WFT) is a key factor affecting the fluidity of mortar, which can be influenced by changes in the sand-cement (S/C) ratio and polycarboxylate superplasticizer (PCE) dosage. The study found that increasing S/C ratio decreases mortar packing density, WFT, and increases cohesiveness, leading to decreased flow spread and strength. Increasing PCE dosage increases mortar packing density, WFT, and decreases cohesiveness, thereby increasing flow spread.
Article
Construction & Building Technology
Saeid Ghorbani, Mohammad Mohammadi-Khatami, Sahar Ghorbani, Amir Elmi, Minoo Farzan, Vala Soleimani, Mohammadamin Negahban, Vivian W. Y. Tam, Mohammadreza Tavakkolizadeh
Summary: This research investigated the effects of marble waste dust (MWD) and magnetized water (MW) on the properties of mortar mixes, with results showing that MW improved the fresh, hardened, and durability properties of the mortar mixes. Mortar mixes with 10% MWD as a cement replacement displayed the most significant improvement in performance compared to other mixes.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jyoti Rashmi Nayak, Jerzy Bochen, Malgorzata Golaszewska
Summary: The study investigates the properties of fresh and hardened mortar reinforced with natural and synthetic fibers. The research found that natural waste fibers have distinct advantages over synthetic fibers, and recommends using jute fiber with mortar for structural purposes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Crystallography
Elisabete R. Teixeira, Aires Camoes, Fernando G. Branco, Jose Campos Matos
Summary: The study found that using BFA as a cement replacement material in high volume fly ash mortar and concrete has potential applications, with BFA showing similar performance to coal fly ash and performing well under certain conditions.
Article
Chemistry, Physical
Leo Gu Li, Pui-Lam Ng, Kai-Long Zeng, Hui-Zhu Xie, Cong-Mi Cheng, Albert Kwok-Hung Kwan
Summary: Previous studies have shown that the fresh properties of plain mortar/concrete are determined by the average water film thickness (AWFT), but whether this concept applies to fibrous mortar/concrete needs to be further explored. Additionally, the added fibers also have effects on the fresh properties of fibrous mortar/concrete. This study employed a fiber factor (FF) and found that the AWFT and FF together are the governing parameters for the fresh behaviors of basalt fiber-reinforced mortar (BFRM). Regression analysis showed good correlations between the workability, fluidity, cohesiveness, and adhesiveness of BFRM with the AWFT and FF, suggesting that they can be used to develop a model for the fresh properties of BFRM.
Article
Construction & Building Technology
Ismael Justo-Reinoso, Mark T. Hernandez, Wil V. Srubar
Summary: This study investigated the impact of substituting fine aggregate with copper-laden BOFS particles on the hydration and microstructural evolution of portland cement mortars, revealing delays in setting times and some degree of pozzolanic reactivity. Compressive strengths of mixtures analyzed were not affected by the presence of copper-laden BOFS, demonstrating its potential as a solution for MICC.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Yuelin Li, Jian Yin, Qiang Yuan, Tingjie Huang, Jiaguo He, Jiabin Li
Summary: This study aimed to investigate the performance of calcined cutter soil mixing residue (CSMR) as a supplementary cementitious material (SCM) in sustainable cementitious materials. The results showed that calcined CSMR improved the flow-ability of cement paste, accelerated cement hydration, refined pore structures, and had negligible adverse effects on the performance of cement mortar. Additionally, the incorporation of calcined CSMR reduced the embodied energy and carbon emissions of cement mortar. Overall, this research demonstrated the possibility of using calcined CSMR as a new SCM for greener cementitious materials without compromising engineering properties.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Agathe Bourchy, Alessandra L. Fujii Yamagata, Gary L. Smith, Gary J. Sevigny, Brienne N. Seiner, Sarah A. Saslow
Summary: Cements used in nuclear waste treatment must be thoroughly tested, but using actual radioactive wastes is expensive, so non-radiological surrogates are used. Cerium is often used as a surrogate for actinides uranium and plutonium in spent nuclear fuel, but its impact on cement properties is not well-studied. This research compares the properties of three classes of cements with and without ceria, and suggests that using ceria as a surrogate may not accurately represent the behavior of uranium and plutonium sources.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Chemistry, Physical
Zuzanna Zofia Wozniak, Adrian Chajec, Lukasz Sadowski
Summary: The waste granite powder from the production of granite can cause health problems for people living nearby. However, it can be partially used as a replacement for cement in masonry mortars, although it may affect the properties of the mortar.
Review
Construction & Building Technology
Gokulanathan Venkatesan, Arun Kumar, Priyadharshini Perumal
Summary: Freshwater shortage is a global issue affecting concrete production and water resource management; by studying the effects of alternative non-potable water sources such as seawater, waste water, and greywater on concrete properties, sustainability in the concrete industry can be enhanced.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Hengrui Liu, Zhenghong Tian, Xiao Sun, Yuanshan Ma, Haoyue Fan, Yun Dong
Summary: A multiple sieve method was proposed to characterize different flocculation structure sizes within cement paste, and the effects of these structures on the fresh properties of cement paste were investigated using grey theory. Water film thickness and bonding strength coefficient were identified as important factors for analyzing the fresh properties of cement paste.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Tingye Qi, Xinyu Gao, Guorui Feng, Jinwen Bai, Zehua Wang, Qiusong Chen, Haochen Wang, Xianjie Du
Summary: By introducing biomass power plant ash (BPPA) into the preparation of coal gangue backfill materials, the fresh properties of cement coal gangue backfill (CCGB) can be significantly improved. It is recommended that the replacement rate should be greater than 10% when BPPA replaces cement and should not exceed 20% when BPPA replaces fly ash. The findings have significant implications for the application of BPPA cemented backfill material in engineering practice.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
