— Mineral carbonation in recycled concrete aggregate and recycled hardened cement powder is that CO 2 chemically reacted with calcium hydroxide, calcium silica hydrate, etc., forming thermodynamically stable carbonate minerals to absorb CO 2, and improve the fine value, high porosity and water absorption of recycled hardened cement …

 — Jose JP, Suganya S, Priya B (2014) Use of glass powder as fine aggregate in high strength concrete. Int J Sci Eng Res 2(7) Keerio MA, Abbasi SA, Kumar A, Bheel N, Rehaman K u, Tashfeen M (2020) Effect of silica fume as cementitious material and waste glass as fine aggregate replacement constituent on selected properties of concrete.

 — Using travertine aggregate and powder to develop travertine pervious concrete. • The 20 % void content of TPC was recommended for the fully pervious pavement. • The 5–10 % travertine powder can replace cement to satisfy the performance of TPC. • TPC's heavy metal removal rate was lower in rapid method than in immersion …

 — The cement in the concrete was replaced with 0%, 10%, 20%, 30% Seashell powder and aggregate in the concrete was replaced with 0%, 5%, 10%, 15% seashell aggregate. Three specimens were prepared under each type, corresponding to each replacement. All category specimens were under curing for the period of 7, 28, 56 and …

 — Keywords: sodium silicate, waste tire rubber powder, pumice lightweight aggregate concrete, freeze-thaw cycles, pore structure, fluid saturation. 1. Introduction. Pumice is a special stone with a bubble shape formed after a magma eruption in full contact with the atmosphere. Pumice has the characteristics of porosity, soft texture, and low ...

 — Recycled coarse aggregate 1 (RCA) was treated with silica fume cement 2 (SFC) paste. Subsequently, specimens of two types of concrete were prepared: one with treated RCA 3 (TRCA) and another with natural coarse aggregate 4 (NCA) based on conventional concrete 5 (CC) mixture designs. The slump, cubic, and prism compressive …

 — However, as it has been pointed out that studies on concrete recycling are mainly focused on coarse aggregate [13], research on repeated recycling of concrete has also largely concentrated on the effects of recycled coarse aggregate, with fewer studies examining the impacts of recycled fine aggregate. Recycled concrete powder (RCP), the …

 — To improve the durability of pumice lightweight aggregate concrete applied in cold and drought areas, sodium silicate-modified waste tire rubber powder is used to treat the pumice lightweight aggregate concrete. The pumice lightweight aggregate concrete studied is mainly used in river lining structures. It will be eroded by water flow and the …

 — The current trend in the development of self-compacting concrete with sustainable construction materials has served as a guide to design a novel self-compacting concrete, with siderurgical by-products (steel slag aggregates and cupola slag powder as supplementary cementing material) that also meets the demands of high-performance …

 — Cement (also called Portland cement) is a fine binding powder that is never used alone but is a component of concrete and mortar, stucco, tile grout, and thin-set adhesive. ... Made from a mixture of Portland cement, water, and aggregate of various sizes; Available in several different formulations;

 — The simultaneous usage of waste rubber powder (WRP) and recycled concrete aggregate (RCA), as two recycled materials, on the mechanical properties and durability performance of concrete were …

 — The 28 d compressive strength of lightweight high-strength concrete (cement 756 kg, silica fume 42 kg, slag powder 42 kg, floating beads 210 kg, ceramsite 165 kg, water reducer 16.8 kg, deer 2 kg, thickener 5 kg, water 218.4 kg) prepared by unburned ceramsite can reach 45.2 MPa, the dry apparent density is 1435 kg/m 3, and …

Key Takeaways. Fine aggregates consist of sand, crushed stone, or crushed slag with a diameter of less than 9.5 mm. The 5 types of fine aggregates are natural sand, crushed …

 — Recycled concrete powder (RCP) is the residual powder generated while crushing waste concrete into a recycled aggregate. In order to achieve the low energy consumption resource utilization of RCP solid waste, a large amount of RCP with slag (a by-product of the blast furnace ironmaking process) addition was activated under an …

 — It is challenging to produce high-strength coral aggregate concrete (CAC) due to the high porosity and low strength of coral aggregate (CA). To enhance the properties of CAC, this study proposes a novel pre-treatment protocol for CA, using the cement-metakaolin-coral powder (CMC) ternary slurry or the pure cement (PC) slurry to …

 — P·O 42.5 cement and limestone powder were used as the cementitious materials. The chemical composition of Portland cement and limestone powder are listed in Table 1.The Blaine fineness of cement and limestone powder were 290 m 2 /kg and 680 m 2 /kg, respectively. River sand with 2.6 fineness modulus and 5–20 mm natural gravel …

 — Concrete is a composite blend of cement, fine aggregate and coarse aggregate, and water . The aggregates occupy almost 70–75% of the concrete volume, ... Ashish DK (2018) Feasibility of waste marble powder in concrete as partial substitution of cement and sand amalgam for sustainable growth. J Build Eng 15:236–242

 — Coarse aggregate reactive powder concrete (CA-RPC) has been proposed to fulfill the criteria of high performance and cost-effectiveness. This study introduced an innovative application of CA-RPC and presented an experimental investigation on the flexural behavior of a full-scale prefabricated CA-RPC slab. On be basis of this study, the ...

 — The recycled materials from concrete waste mainly consist of recycled concrete aggregate (RCA) and recycled concrete powder (RCP). The RCA is frequently used to replace natural aggregate in newmade concrete, and the RCP is usually utilized as supplementary cementitious material (SCM) to substitute cement in newmade concrete [ …

 — Cement is a powder that contains calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), iron, and gypsum. Manufacturers produce it from shells, blast furnace slag, and limestone, …

concrete containing marble powder is more durable than reference concrete (Geso lu et al., 2012; Belaidi et al., 2012). Hameed et al. (2012) reported that self-compacting concrete produced with marble powder is the innovative concrete. Marble powder is also used to increase the strength and durability of construction materials, such as paving ...

 — Mineral xide aggregate (MTA) is a are powder primarily composed of tri- and dicalcium silicates with bismuth oxide radiopacifier. MTA has been an addition to the dental armamentarium since the 1990s. When mixed with …

Using aggregate materials for concrete reduces production costs and increases the resistance of concrete mixes. Crushed aggregates make up for around 60% to 75% of …

 — Measurements were performed on 30 crushed concrete aggregate powder materials (fines) constituting three size fractions with d10 to d90 ranges of 4 µm to 25 µm, 20 µm to 60 µm and 40 µm to 250 µm from 10 different rock types. For fines passing 125 µm or 63 µm sieves, generally about 50 % of the surface area is concentrated among ...

 — Recycled aggregate (RA) and recycled concrete powder (RCP) hold significant potential as environmentally sustainable raw materials for asphalt mixtures. In this study, a comprehensive investigation was conducted on the bonding properties between RA and RCP-filled asphalt mastic (RCPAM). This investigation utilized an image processing …

 — The chemical compositions of both cement and brick powder are listed in Table 1, and the particle distribution of cement and waste brick powder is in Fig. 2.The fine aggregate that was used has a maximum particle size of 4.25 mm, fineness modulus of 3.18, and a S.G. of 2.6, which is within the limits of the Iraqi Specification No.45 …

 — The relationship between ultrasonic wave velocity and age of lightweight aggregate concrete with glass powder. (5) Relationship with compressive strength: (see Fig. 16). The correlation coefficients (R 2) of the control, fly ash, and slag groups were 0.9090, 0.8807, and 0.8894, respectively. This indicated that the ultrasonic wave velocity had ...

 — The strength of coated recycled aggregate concrete (CRAC) reached 86.95 % of that of natural aggregate concrete, surpassing that of conventional recycled aggregate concrete (RAC). The results of the NMR analysis showed that the coating effectively enhanced the pore structure of RAC, reducing capillary and large pores by 78.14 % and …

The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for …

Aggregates comprise as much as 60% to 80% of a typical concrete mix, so they must be properly selected to be durable, blended for optimum efficiency, and properly controlled to produce consistent concrete …