The effect of sand ration on the properties of self-compacting concrete

Zhao, Hui; Sun, Wei; Wu, Xiaoming; Gao, Bo

doi:10.1680/macr.11.00089

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…When the sand ratio was 0.5, the compressive strength values of RS-SCLC, MS-SCLC and LS-SCLC were increased by 6%, 3% and 8%, respectively. Similar findings on self-compacting normal concrete with different sand ratios were reported by other research [32,33]. Based on the present results, it seems that the effect of sand ratio on the compressive strength of SCLC is similar to that on ordinary SCC.…”

Section: Resultssupporting

confidence: 92%

Experimental Investigation of the Effect of Manufactured Sand and Lightweight Sand on the Properties of Fresh and Hardened Self-Compacting Lightweight Concretes

2016

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Self-compacting lightweight concrete (SCLC) is a promising construction material for building applications, but most SCLCs today are made with river sand (RS). There is an increasing demand for environmental protection, as well as materials with a high strength/density ratio. The manufactured sand (MS) and lightweight sand (LS) as fine aggregates in cement-based composite materials have been receiving more attention among researchers. However, there is not much information about the effects of MS and LS on the properties of the fresh and hardened SCLCs. In this paper, the properties of fresh and hardened SCLC made with MS and LS were investigated by a series of experiments. SCLCs made with RS served as the control in this study. The test results show that increasing the sand ratio (from 0.40–0.50) decreased the filling ability and led to an increased T50 time, which is the time spent for the concrete to reach the 500 mm spread circle, for all of the fresh SCLCs. Although the passing ability of MS-SCLCs and LS-SCLCs is not as good as RS-SCLCs, their results are still within an acceptable range. The ratio of mechanical properties to density was found to increase with an increase of the sand ratio for all of the hardened SCLCs. MS-SCLCs presented the highest compressive strength among all of the SCLCs studied. Although the mean compressive strength of LS-SCLCs is lower than those of the other two SCLCs by 8%, their strength to density ratio is higher than others by 15%, and the ratio increases remarkably with the increase of the sand ratio. Permeability test results showed that the permeability coefficient of MS-SCLC is remarkably lower than that of LS-SCLC, but slightly higher than that of RS-SCLC.

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Section: Resultssupporting

confidence: 92%

Experimental Investigation of the Effect of Manufactured Sand and Lightweight Sand on the Properties of Fresh and Hardened Self-Compacting Lightweight Concretes

2016

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“…According to the research results on the fly-ash-based SCC (Das and Chatterjee, 2012;Dinakar, 2012;Zhao et al, 2013), a basic mix proportion of SCC is employed as the reference mix in the research (Table 6). Polypropylene fibre-reinforced SCC (PFRSCC) is obtained by adding polypropylene fibre directly into the reference SCC.…”

Section: Proportionmentioning

confidence: 99%

Combined impacts of polypropylene fibres on workability, strength and permeability of SCC

He¹,

Yan²,

Gu³

et al. 2014

Magazine of Concrete Research

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The workability, strength and permeability of self-consolidating concrete (SCC), reinforced with polypropylene monofilament fibre, collated fibrillated polypropylene network fibre and a hybrid of these two, are investigated.Combined impacts of polypropylene fibres on SCC are then analysed using the theory of Bingham plastic flow, the principle of fracture mechanics and the composition of microstructure based on scanning electron microscopy. Resultsshow that: (a) in the case of identical fibre volume fraction, the workability of fresh SCC reinforced with polypropylene monofilament fibre is better than that with fibrillated polypropylene network fibre; (b) when the fibre volume fraction is less than 0 . 10%, strength properties and water impermeability of hardened SCC increase with the fibre addition, and the charge passed increases slightly, but when the fibre volume fraction is higher than 0 . 15%, the charge increases dramatically; (c) SCC with polypropylene monofilament fibre has better impermeability, but lower static strength than that with fibrillated polypropylene network fibre; (d) compared with ordinary SCC, SCC with the hybrid of 0 . 05% volume fraction of polypropylene monofilament fibre and 0 . 05% collated fibrillated polypropylene network fibre has a 22% increase in flexural tensile strength, a 21% increase in splitting strength and a 56% decrease in water penetration depth, and the Coulomb value of chloride ion penetrability is low, about 1013 C at 56 d.

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“…To achieve this, the SCC must, in addition to possessing high fluidity, display a good ability to flow and pass between the reinforcing bars, as well as an exceptional capacity to flow in the manner of a "viscous fluid" [4,5]. One of the most advanced concrete technologies is self-compacting concrete (SCC) [6]. However, SCC is being reconsidered due to its high cement content, which results in an increased carbon footprint in response to the rising demand for sustainable development.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Waste Ceramic Powders and Waste Glass Powders on the Rheological and Mechanical Properties of Self-Compacting Concrete

Khairi,

Rejeb

2024

Tikrit j. eng. sci.

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Two key axes dominated this experimental research. The first was developing self-compacting concrete from ceramic waste powder (CWP) and glass waste powder (GWP), which met and followed the recommended European specification and guidelines for self-compacting concrete (EFNARC) standards. The second axis indicated the self-compacting concrete's rheological and mechanical performance. Sixteen different mixtures were produced using supplementary cementitious materials (SCMs) to replace cement partially. The replacement levels of SCMs were 5%, 10%, and 15% (by weight of cement), divided into three series: Series A (containing ceramic waste powder), Series B (containing glass waste powder), and Series C (containing combinations of ceramic waste powder and glass waste powder). The SCC rheological properties for all mixtures with different levels of SCMs replacement in the mixture gradually decreased as the substitution ratios increased. The reduction in flowability for substitution, ranging from 5% to 35%, was approximately 0% to 12%, respectively. However, the reduction was insignificant; the fresh properties remained within the limits specified by EFNARC. Regarding the mechanical properties, at an early age, the strength of mixtures decreased with increasing alternative ratios. However, after 90 days, the strength increased by about 11% and 9% of the compressive and flexural strengths, respectively, over the control mix, indicating that SCMs improve the concrete strength over time and are suitable to contribute to an eco-friendly concrete industry without compromising strength.

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The effect of sand ration on the properties of self-compacting concrete

Cited by 5 publications

References 13 publications

Experimental Investigation of the Effect of Manufactured Sand and Lightweight Sand on the Properties of Fresh and Hardened Self-Compacting Lightweight Concretes

Experimental Investigation of the Effect of Manufactured Sand and Lightweight Sand on the Properties of Fresh and Hardened Self-Compacting Lightweight Concretes

Combined impacts of polypropylene fibres on workability, strength and permeability of SCC

The Effects of Waste Ceramic Powders and Waste Glass Powders on the Rheological and Mechanical Properties of Self-Compacting Concrete

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