October 2024
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17 Reads
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2 Citations
Construction and Building Materials
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October 2024
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17 Reads
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2 Citations
Construction and Building Materials
June 2024
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9 Reads
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2 Citations
Journal of Building Engineering
April 2024
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21 Reads
Materials
For solid waste-based cementitious materials, most scholars focus their research on the hydration reaction of cementitious materials, but there is still a lack of solid waste design that comprehensively considers mechanical properties and durability. Therefore, this article focuses on exploring the mix of design and the microscopic and macroscopic properties of multi solid waste cementitious materials (MSWCMs), namely steel slag (SS), slag powder (SP), desulfurization gypsum (DG), fly ash (FA), and ordinary Portland cement (OPC). According to the orthogonal experimental results, the compressive strength of MSWCMs is optimal when the OPC content is 50% and the SS, SP, DG, and FA contents are 10%, 20%, 5%, and 15%, respectively. The MSWCMs group with an OPC content of 50% and SS, SP, DG, and FA contents of 5%, 15%, 5%, and 25% was selected as the control group. The pure OPC group was used as the blank group, and the optimal MSWCMs ratio group had a 28-day compressive strength of 50.7 megapascals, which was 14% and 7.6% higher than the control group and blank group, respectively. The drying shrinkage rate and resistance to chloride ions were also significantly improved, with maximum increases of 22.9%, 22.6%, and 8.9%, 9.8%, respectively. According to XRD, TG-DTG, and NMR testing, the improvement in macroscopic performance can be attributed to the synergistic effect between various solid wastes. This synergistic effect produces more ettringite (AFt) and C-(A)-S-H gel. This study provides a good theoretical basis for improving the comprehensive performance of MSWCMs and is conducive to reducing the use of cement, with significant economic and environmental benefits.
April 2024
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2 Reads
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2 Citations
Journal of Building Engineering
February 2024
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30 Reads
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7 Citations
Construction and Building Materials
February 2024
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8 Reads
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9 Citations
Construction and Building Materials
January 2024
January 2024
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1 Read
November 2023
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15 Reads
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8 Citations
Construction and Building Materials
October 2023
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42 Reads
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19 Citations
Journal of Building Engineering
... Due to the microfilling and nucleation effects, silica fume appears to be an essential ingredient in most research on LC 3 -UHPC [17][18][19][20][21]. However, as an industrial by-product, silica fume has issues with quality inconsistency and limited production capacity [22]. As a result, the addition of silica fume may restrict the future development of LC 3 -UHPC. ...
June 2024
Journal of Building Engineering
... De acordo com ZHAO et al. [6] o aumento da rugosidade e o formato circular do agregado aumentam a tensão de escoamento e, consequentemente, otimiza a estabilidade do concreto, resistência à deformação e resistência à compressão. Portanto, é fundamental selecionar agregados com determinada morfologia para melhorar propriedades mecânicas para diversas aplicações na indústria da construção [7]. ...
April 2024
Journal of Building Engineering
... At the same time, the particle size and shape of fine aggregates also influence the rheology and flow characteristics of SCGC [23]. Commonly, the finer particles improve the packing density and fill voids between coarse aggregates, enhancing the homogeneity and workability of the mix [24]. Fine aggregates contribute to the overall surface area available for geopolymerization reactions. ...
February 2024
Construction and Building Materials
... A notable influencing factor is the ambient curing moisture and improper curing methods, such as insufficient water, which are disadvantages to the hydration progress. Further, premature exposure to air (CO 2 ) leads to the decomposition of the already formed ettringite [15][16][17]. Thereafter, a comparative study on curing conditions affecting PCBA property evolution is desired so as to guide combined curing method selection for optimizing PCBA production. ...
February 2024
Construction and Building Materials
... Researchers have extensively studied carbonation curing for cement pastes containing SCMs [40][41][42][43]. Qin et al. [44] investigated the properties of cement pastes blended with three SCMs (limestone powder, fly ash (FA) and granulated blast furnace slag (GBFS)) under carbonation curing. ...
November 2023
Construction and Building Materials
... It can be said that the impact of selfdesiccation to generate denser microstructure through secondary hydration is more reflexive at the w/b ratio of 0.15 compared to when it increases to 0.175 and 0.2 (Fig. 7). Previous studies also confirmed the dense microstructure of the UHPFRC mixtures through microstructural examinations, including SEM and EDS analyses (Chen et al., 2019;Dong et al., 2022;Zhao et al., 2023). The formation of pores is expected to be higher in the concrete with a higher w/b ratio, thereby lowering and increasing its resistivity and conductivity, respectively. ...
October 2023
Journal of Cleaner Production
... However, limited modelling capacity of this method and extensive experimental cost has driven the development of alternative approaches, including fractional factorial design (Bhaskar et al., 2023) and response surface methodology (Li et al., 2021). Moreover, multi-response optimization studies have increasingly utilized advanced techniques, including evolutionary multi-objective optimization algorithms such as Non-dominated Sorting Genetic Algorithm II (NSGA-II), as well as reinforcement learning approaches, to optimize mechanical properties and minimize the cost (Chen et al., 2022;Wang et al., 2023;Zheng et al., 2023). ...
October 2023
Journal of Building Engineering
... The inclusion of silica fume in the geopolymer matrix further enhances mechanical properties, promoting additional C-S-H gel formation and improving interfacial bonding between the mortar and aggregates. The interaction between these parameters ultimately underscores the necessity for an integrated approach in mix design, enabling the development of geopolymer mortars with superior compressive strengths and durability characteristics [22,42]. ...
July 2023
Construction and Building Materials
... (Leite et al., 2023;Pupin et al., 2022) Environmental conservation has been a global concern since natural resources are not infinite, and nature is incapable of absorbing the excessive production of waste (Freita et al., 2016). In this scenario of search for innovative products, researchers investigate materials to be incorporated into concrete, such as waste from the oil cracking industry, vegetable fibers, rice husk ash, sugarcane bagasse, as well as various types of polymers (Huang et al., 2023;Akid et al., 2021;Rostami et al., 2020;Gu and Ozbakkaloglu, 2016;Asim et al., 2021;Kajaste and Hurme, 2016). ...
June 2023
Cement and Concrete Composites
... Porosity is a key indicator for assessing the performance of vegetation porous concrete [20], influenced by factors such as aggregate particle size [14], paste-aggregate ratio [72,73], and type of cementitious materials [27]. Porosity not only affects the mechanical strength of vegetation porous concrete but also plays a crucial role in plant growth, directly impacting water supply, gas exchange, and root development. ...
March 2023
Materials