Low Carbon Concrete Prepared with Scattering-Filling Coarse Aggregate Process

Zhang, Chuan; Li, Xinling; Shi, Hongliang; Wang, Guiming; Tian, Xiaowu

doi:10.1007/s40069-014-0080-5

Cited by 16 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some scholars have carried out some research on riprap aggregate concrete. For example, Shen et al (2014) found that the use of riprap aggregate concrete technology can improve the compressive strength of test pieces and reduce the cement content by 20% for C30~C80 concrete. Xu et al (2020) found that when the distribution-filling rate was 15%, the compressive strength of distributing-filling coarse aggregate concrete was increased by 11.6%-27.0% compared with ordinary concrete.…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of foamed concrete with recycled concrete aggregates

Han

Zhang²,

Zhang³

et al. 2023

Front. Mater.

View full text Add to dashboard Cite

A large amount of waste concrete is produced during old city reconstruction. In order to realize the lightweight reuse of recycled concrete aggregate, a new preparation scheme of foamed concrete is proposed. Through single-factor tests, the effects of recycled coarse aggregate (RCA) gradation, RCA volume ratio, water-cement ratio and foam content on the preparation process and performance of RCA foamed concrete (RCAFC) were explored. The results showed that RCA grade has significant influence on the performance of RCAFC. Grading level Ⅲ (i.e., the mass ratio of five-type aggregates sized, respectively, 9.5–16 mm, 16–19 mm, 19–26.5 mm, 26.5–31.5 mm and 31.5–37.5 mm is 2:4:8:3:3) can reduce the water absorption by 4.6%, increase the compressive strength by 6.0%, and decrease the difficulty of sample preparation compared with the natural grading. The increase of RCA volume fraction is directly proportional to the compressive strength and inversely proportional to the water absorption. With the raising of water-cement ratio, the fluidity of foamed concrete paste increases linearly, the dry density decreases, the water absorption decreases first and then increases, and the compressive strength increases first and then decreases. The increase of foam content is inversely proportional to fluidity, dry density and compressive strength, and it is directly proportional to water absorption. Among the above four factors, the grade of RCA has the greatest impact on the early strength of the sample, whilst the content of foam is the smallest.

show abstract

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of foamed concrete with recycled concrete aggregates

Han

Zhang²,

Zhang³

et al. 2023

Front. Mater.

View full text Add to dashboard Cite

show abstract

“…Based on the previous studies, the DFCA process signi cantly improves the compressive strength and elastic modulus and minimizes the chloride ion penetration and drying shrinkage. With the DFCA ratio of 20%, the reference concretes with C30-C80 strength grades are improved by 20% in compressive strength [9]. Selfcompacting concrete generally has high paste content, which would lead to significant drying shrinkage.…”

Section: Introductionmentioning

confidence: 99%

Influence of Coarse Aggregate Concentration on the Frost Resistance of Non-Air-Entrained Concrete

Cai

Wang

et al. 2022

Journal of Engineering

View full text Add to dashboard Cite

Aggregate-interlocking concrete is a kind of low-carbon and high-performance concrete, while the aggregate-interlocking concrete prepared by the distributing-filling coarse aggregate (DFCA) process worsens frost resistance than ordinary concrete. In order to better apply the aggregate-interlocking concrete, it is necessary to figure out the relationship between the frost resistance and the coarse aggregate concentration. In the study, three series of concretes, C30, C40, and C50, are designed, and the charge passed, scaling mass, water uptake, and penetration depth of NaCl solution are tested as indicators to account for the relationship between frost resistance and coarse aggregate concentration. The results indicate that aggregate still has a strong restraint effect on the permeability of concrete after freezing-thawing cycling, but compared to the unfrozen concrete, the charge passed of the concrete with higher aggregate concentration tends to increase more intensively. The scaling happens at both bulk mortar and interfaces between aggregate and mortar. The increase in aggregate concentration could restrain the scaling of mortar, but excessive aggregate concentration results in a significant increase in scaling mass. The concrete with higher coarse aggregate concentration could absorb more water during the freezing-thawing cycling, and the penetration depth of NaCl solution also increases with the increase of coarse aggregate concentration. The results reveal that the increase in aggregate concentration degrades the frost resistance of concrete, and the DFCA process could be applied in high-strength concrete to mitigate the negative effect of coarse aggregate on the frost resistance of concrete.

show abstract

“…It was found that the compressive strength is the largest when the post filling rate of coarse aggregate reaches 20%. Shen 13 prepared C30–C80 grade scattering‐filling coarse aggregate concrete. It was indicated that, with the increase of the post filling rate of coarse aggregate, the shrinkage of concrete decreases and ITZ between coarse aggregate and cement paste tend to be thinner and more compact.…”

Section: Introductionmentioning

confidence: 99%

“…At present, although the material properties of post filling coarse aggregate concrete have been studied, 7,9,12‐16 the structural performances of post filling coarse aggregate concrete‐made structural members have not been investigated. It is crucial to study and understand the structural behavior of post filling coarse aggregate to facilitate its application in engineering.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of axial compression of reinforced concrete columns made by environment‐friendly post‐filling coarse aggregate process

Cao

Jia

Zhang

et al. 2021

Structural Concrete

View full text Add to dashboard Cite

The increase of coarse aggregate content decreases the shrinkage of concrete, decreases the cost of concrete production as well as reduces the carbon dioxide emission to the environment. In this study, the mixture proportions of PFCC (post‐filling coarse aggregate concrete) for C40, C50, and C60 were designed and the comprehensive performances of workability, compressive strength and elastic modulus were conducted experimentally. Then, 15 reinforced concrete columns made by PFCC with different concrete grades and post filling rates (PFR) were designed and tested. The failure mode, load‐deflection curve, load‐strain curve and load bearing capacity were analyzed and elaborated. Results showed that, compared with the conventional concrete, the compressive strength and elastic modulus of the post filling coarse aggregate concrete were improved, which reached the highest when the post filling rate is 20%. At the same time, the load bearing capacity of column specimen increased first and then decreased as the post filling rate increased, with the transition point being at 10% post filling rate. This study provides reference and research data for technical regulations and design specifications of structural members made of post filling coarse aggregate concrete.

show abstract

Low Carbon Concrete Prepared with Scattering-Filling Coarse Aggregate Process

Cited by 16 publications

References 11 publications

Physical and mechanical properties of foamed concrete with recycled concrete aggregates

Physical and mechanical properties of foamed concrete with recycled concrete aggregates

Influence of Coarse Aggregate Concentration on the Frost Resistance of Non-Air-Entrained Concrete

Experimental study of axial compression of reinforced concrete columns made by environment‐friendly post‐filling coarse aggregate process

Contact Info

Product

Resources

About