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This paper investigates the effect of limestone fines content in manufactured sand (MS) on compressive strength, chloride ion permeability and freeze–thaw resistance of both low- and high-strength concretes.The abrasion resistance of concretes and sulfate attack of mortars were also tested. The results show that for low …
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Jun 22, 2022. Impact of Limestone Powder on the Mechanical and Microstructure Properties of Magnesium Oxychloride Cement Pastes. Authors: Yuhang Liang., Qing …
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@article{Zhang2023MechanicalBO, title={Mechanical behavior of sustainable engineered cementitious composites with construction waste powder as binder and sand replacement}, author={Zhiyu Zhang and Xin Liu and Ruihan Hu and Chao-feng Liang and Youchao Zhang and Zhiming Ma}, journal={Construction and Building Materials}, year={2023}, url={https ...
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Mechanical properties and hydration of ultra-high-performance seawater sea-sand concrete (UHPSSC) with limestone calcined clay cement (LC3) May 2023 …
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The mix proportions of HVLCC-ECC (with 70% and 80% LCC by weight of binder) are listed in Table 3.Specifically, L stands for LCC blend; S stands for Sand; and W stands for Water in the Mix ID. Three water/binder ratios (0.30, 0.35 and 0.40) as well as two sand/binder ratios (0.2 and 0.4) were explored, and the content of super-plasticizers …
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Consequently, limestone calcined clay cement (LC 3), known for its partial replacement of cement at a typical level of 50 %, exhibits mechanical properties like ordinary Portland cement (OPC) at the 7-day mark. Additionally, the possibility of achieving an ultra-high substitution level (greater than 50 %) was also investigated.
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To verify its feasibility, sandstone, syenite, marble, and basalt aggregates were selected to test the mechanical properties and road performance of the four aggregate concretes at 7, 28, 90, and ...
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Crushed limestone sand (CLS) is a by-product that is generated during limestone excavation. ... The amount and properties of sand affect the workability, mechanical properties and durability of concrete. With the growing shortage of natural silica sand, effective alternatives are required. ... Although the feasibility of using CLS in concrete ...
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Feasibility of using ultrahigh-volume limestone-calcined clay blend to develop sustainable medium-strength Engineered Cementitious Composites (ECC) ... Effect of morphological parameters of natural sand on mechanical properties of engineered cementitious composites. Cement and Concrete Composites, Volume 100, …
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The structure of calcium carbonate in eggshells is trigonal calcite, which is identical to limestone [20]. Binici et al. [21] investigated pulverized eggshell waste as a replacement of fine aggregates by substituting sand in cement mortar and measured the strength evolution of mortars during hydration at 7, 28, and 90 d. The strength ...
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An experimental study is presented in this article to demonstrate the concept and feasibility of ultra-high-performance seawater sea-sand concrete: ultra-high-performance seawater sea-sand ...
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DOI: 10.1016/j.conbuildmat.2022.126333 Corpus ID: 245866362; Effects of w/b ratio, fly ash, limestone calcined clay, seawater and sea-sand on workability, mechanical properties, drying shrinkage behavior and micro-structural characteristics of concrete
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The chemical degradation in the immersion condition significantly affects the mechanical behaviour of the limestone. In particular, the pore collapse limit stress is largely decreased; there is also a diminution of material cohesion and elastic modulus while the porosity is increased by the dissolution of calcite.
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Microbial-induced CaCO3 precipitation (MICP) is an innovative and rapidly developing technology for sand solidification. The idea for this research project was built based on the concept of sustainable development and environmental protection. The specific material used for solidification was soluble calcium ions generated by the …
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In mechanical recycling, the typical process involves collecting, sorting, washing, and grinding the materials, depending on the waste's origin and composition. ... The fine aggregates used were stone dust from a limestone source, natural sand, and polyethylene terephthalate micronized as powder, resulting from the recycling process of ...
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The feasibility of sifted desert sand as supplementary cementitious material is proved. ... [22]. When it was incorporated as SCM, it played a similar role as the inert admixtures like limestone powder, and the strengthening mechanisms can be summarized as micro-filling effect, nucleation effect, dilution effect, and weak chemical …
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Increasing the glass sand size up to 1.18 mm or using 100 % of glass sand decreases the average crack width by around 25 % due to the facilitated crack initiation by the weak glass-geopolymer ...
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Robust evidence suggests that when the particle size of shells in sea sand is less than 4.75 mm and the substitution range of sea sand in concrete meets conditions like 20%− 40%, sea sand has minimal negative effects on the mechanical properties of concrete, and it may even offer prospects for accelerating cement hydration, improving …
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An experimental study is presented in this article to demonstrate the concept and feasibility of ultra-high-performance seawater sea-sand concrete: ultra-high-performance seawater sea-sand concrete samples with a 28-day cube compressive strength of over 180 MPa were successfully produced; the samples were made of …
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Coral sand foundation formed by hydraulic fill often faces the problem of poor bearing capacity. This paper proposed for the first time to apply CFG pile composite foundation to coral sand sites to verify the feasibility of this scheme and understand its mechanical characteristics. Firstly, taking on-site coral sand as the research object, a …
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This research confirmed the feasibility of cheap limestone waste and soluble calcium ions generated by acetic acid as a calcium source, instead of calcium …
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Semantic Scholar extracted view of "Feasibility of structural retrofit concrete pipelines using limestone calcined clay cement Engineered Cementitious Composites (LC3 ECC)" by He Zhu et al. ... Mechanical behavior of sustainable engineered cementitious composites with construction waste powder as binder and sand replacement.
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Apart from minor variations, limestone is the dominant lithology of SM, SH, MH, LT and KW. Limestone samples were obtained from their outcrops and quarries (Table 1).Since the work mainly comprised of comparative study of physical properties of limestones of these formations, therefore, rocks with lithological inhomogeneities were …
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In this study, an experimental program is conducted to understand the effect of the limestone powder (LSP) content replaced by silica sand on the composite properties. For this purpose, five different engineered cementitious composite (ECC) mixtures were adopted: ECC mixture with only silica sand (SS) for control purposes and …
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The additive of ТіО 2 to the clinker cement-based concrete sand mortars was tried, as reported in (41,42), but not as a whitening additive; it was used as an antifungal and bactericidal ...
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The use of limestone powder (LSP) as a cement replacement is used in abundant applications due to its low cost and wide availability. Adversely, the use of LSP as a part of the precursors of alkali-activated materials (AAMs) is still in the developing stage. This scarcity of studies opened the door and encouraged the researchers for more …
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The objective of the study is to assess the feasibility of total replacement of natural rounded siliceous sand by crushed limestone sand to avoid the dependency of the …
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The dynamic mechanical properties, energy evolution characteristics, breakage modes, and damage mechanism of coral reef sand concrete (CRSC) are distinctly different from those of land-sourced aggregate concrete. Because structures made of CRSC may suffer damage due to earthquakes and artillery shells, it is significant to …
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Biocement production from microbially induced calcium carbonate precipitation (MICP) is an environmentally friendly approach for construction works, but the use of calcium chloride (CaCl2) in the conventional MICP process is a cost-limiting factor. The aim of this work is to develop a method for producing soluble calcium ions through two waste sources, …
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So far, many materials have been used as carrier for bacteria and medium used for their growth, including: expanded clay [23,24], limestone sand [25], perlite [26,27], activated carbon [28,29 ...
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