- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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It is an outstanding solution for protecting the environment using manufactured sand instead of natural river sand in concrete. In this paper, tunnel granite muck was processed into low carbon, coarse and fine aggregates, and low carbon aggregates were used to prepare bridge concrete. Meanwhile, the mechanical …
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Phase-change concrete preparation. PO 42.5 cement, fine sand, and coarse aggregate are used to prepare phase-change concrete. The mixing ratio of concrete was calculated according to the "Specification for mix proportion design of ordinary concrete ...
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Recycling waste phosphogypsum (PG) into phosphogypsum-based cold-bonded aggregates (PCBAs) for eco-concrete production has received extensive attention due to its sustainability for construction industry development. Currently, PCBAs mainly replace the coarse aggregates in concrete while the fine aggregates remain natural …
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Sustainable use of industrial-waste as partial replacement of fine aggregate for preparation of concrete – A review. Author links open overlay panel Manoj Kumar Dash a 1, Sanjaya Kumar Patro b, Ashoke Kumar ... sample shows a thick structure made out uneven grains and the hydrated items connect firmly to the surface of the …
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Fine and coarse aggregates are becoming scarce and meeting the demand of aggregates in the construction industry is becoming a challenging task. In this investigation an attempt is made to utilize Gold mines Crushed Blackstone as a substitute for coarse aggregates in producing concrete.
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In several studies, fine natural aggregate of cement mortar and concrete was replaced by coarse sized aggregate too [2,13]. Table 1 highlights the types and amounts of substitution of natural aggregate by plastic aggregate in the …
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In general, moisture could be hindered by the wall effect of the aggregate during transfer in fresh concrete, which increased the water-to-cement ratio near the aggregate surface and decreased the bonding property between cement paste and aggregate [36]. Thus, the porosity in the zone between paste and aggregate increased, …
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To promote resource reuse and the green, low-carbon transformation of the construction industry, this study uses recycled aggregate from crushed waste concrete and natural bamboo fibers to formulate bamboo fiber-reinforced recycled-aggregate concrete. This study investigates the effects of natural bamboo fiber (NBF) content, …
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The composition of CDW aggregate depends on the type of construction demolition waste used to prepare this type of aggregate. A typical CDW aggregate prepared from normal concrete block contains 65–70 % of coarse and fine sized normal aggregates and 30–35 % of cement paste (Poon et al. 2004a, b).The CDW aggregate …
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Abdo et al. [3] used recycled coarse aggregate to partially replace natural coarse aggregate in the preparation of pervious concrete and systematically investigated the effect of the substitution rate of recycled coarse aggregate on its mechanical properties. The results showed that when the replacement rate of recycled coarse aggregate was ...
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Additionally, utilizing urban solid waste for concrete aggregate preparation can reduce carbon emissions. Ban et al. [38] developed a new low-carbon sulfate-resistant cement mortar, made from various solid wastes such as phosphogypsum and cathode ray tube panel glass, ...
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The use of ceramics as aggregates in concrete has indeed been extensively studied. The properties of ceramics, including compressive strength, water absorption, and surface roughness [26] ... During the preparation of concrete, the cementitious materials, sand and aggregate were stirred for 2 minutes to ensure uniform mixing. ...
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recycled concrete aggregate, cement-treated, lean Summary/Overview 1 Introduction 2 Design Principles 3 Subgrades 4 Subbases 5 References Appendices Index * The use highly open-graded or permeable subbases for concrete pavement is not recommended. This conclusion was reached through experiences with poorly performing pavements …
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First of all, the gasified slag aggregate cement mortar was mixed with calcium carbide residue to further stimulate its activity, and the effect law of different amounts of calciumcarbide residue on mortar strength was studied. ... [13] Jiaming Y and Jizhou S 2011 Test study on preparation sprayed concrete with spontaneous …
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aggregate size and the ratio of geopolymer to aggregate on the performance of the concrete were also discussed. In order to show the relationship between the thickness of geopolymer covered with aggregate and the thermal property of concrete, an equal thickness model was proposed, which could provide a reference for the mix design of …
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Cement acts as a binder and fills up the voids in between the aggregates. The cement-sand aggregate ratio plays a vital role in determining the overall characteristics of concrete. Upon setting the concrete mix, aggregates profoundly contribute to the strength and hardness of concrete. Some common aggregates …
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To reduce the cost of lightweight concrete (LWC) partition panels and to address recycling concrete waste, this work utilized completely recycled fine aggregate (CRFA) to replace the natural fine aggregate and ceramsite in the preparation of LWC and LWC partition panels. To this end, an autoclave-free curing process and an air …
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A review on the use of plastic waste in preparation of cement mortar and concrete preparation is already available [22]. However, several important properties such as toughness, failure characteristics, thermo-physical properties, durability performance of cement mortar and concrete containing plastic as aggregate were not discussed …
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Abstract: Cement-treated base (CTB) is a mixed-in-place or central-plant-produced material consisting of soil/aggregate, cement, and water that creates a strong and durable stabilized roadway base. This guide to CTB discusses its applications, benefits, design, construction, testing, and performance.
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