Mechanical and fresh properties of high-strength self-compacting concrete containing class C fly ash

Ashtiani, Mohammad Soleymani; Scott, Allan; Dhakal, Rajesh

doi:10.1016/j.conbuildmat.2013.06.015

Cited by 62 publications

(15 citation statements)

References 14 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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“…High hydration heat and high autogenous shrinkage are the other disadvantages due to the addition of high cement content. Moreover, from an environmental perspective, cement production is associated with high levels of carbon dioxide emissions, which can lead to the consumption of natural resources and serious environmental impacts . The mechanical and durability characteristics of SCMs are similar to SCC and could be utilized to study the SCC performance mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and durability properties of self‐compacting mortars containing binary and ternary mixes of fly ash and silica fume

Benli

2019

Structural Concrete

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In this paper, the results of experimental work on the strength and durability performances of self‐compacting mortars (SCMs) manufactured from silica fume (SF) and fly ash (FA) were presented. The cement was partially replaced with 5, 10, 15, 20, and 25% of FA and 5, 10, and 15% of SF as binary mixes. Also, ternary mixtures were prepared by the incorporation of FA and SF at different replacement dosages by weight. In total, 14 different combinations of mixes were studied at the ages of 7, 28, and 180 days. Prismatic samples of size 40 × 40 × 160 mm3 were produced and exposed to water curing to observe mechanical behavior of SCMs. The mechanical properties of SCMs were examined by the tests of compressive strength and flexural strength. Sorptivity, porosity, water absorption, and density were also measured. To evaluate fresh properties of SCMs, mini slump flow diameter and mini V‐funnel flow time tests were conducted. The results of the study reveal that increase in the dosage of FA increases SCMs flow but also reduce segregation resistance. The enhancement in flexural strength is the best in the binary mixes of SF10 and in binary mixes of FA. Ten percent replacement of FA shows the best flexural strength performance with a value of 10.21 MPa at the age of 180 days. Compressive and flexural strengths of mortars containing SF and FA reached up to about 86.14 and 10.50 MPa, respectively.

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“…(Table 2.1.1) Details of physical properties of the cement, fly ash, and aggregates as well as the mixing method and procedure are described in a previous study (Soleymani Ashtiani et al, 2010). Standard (NZS3101, 2006) requirements to achieve a strong-column-weak-beam hierarchy where the final expected mode of failure was hinging of the beam at the column face.…”

Section: Beam-column Joint Test Setup and Load Protocol Detailsmentioning

confidence: 99%

“…Literature shows extensive investigations on fresh and mechanical properties (compressive, splitting tensile, and flexural strengths as well as modulus of elasticity, shrinkage and bond strength) of SCC including their comparison with that of CVC (Soleymani Ashtiani et al, 2011, Soleymani Ashtiani et al, 2010, Desnerck et al, 2010, Valcuende et al, 2009, De Almeida Filho et al, 2008, Domone, 2006, Persson, 2001). In addition, researchers have been working on the structural performance in RC members cast with SCC under monotonic loads in the past few years (Hassan et al, 2008, Lachemi et al, 2005, Sonebi et al, 2003.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of High-Strength Self-Compacting Concrete in Reinforced Concrete Beam-Column Joints

2014

Self Cite

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SUMMARY:Beam-column joints of reinforced concrete building frames play an important role under seismic excitations. These are one of the most congested areas in reinforced concrete framed structures; placement of concrete and proper compaction in such areas are hence substantially challenging. This offers a unique area of application for self-compacting concrete which can flow through every corner of extensively reinforced area without any vibration. Therefore if implementing self-compacting concrete in beam-column joints does not compromise seismic performance of the frame, it can be used instead of conventional concrete. This paper focuses on implementation of high-strength self-compacting concrete in beam-column joints and assessment of its seismic behaviour under reversed cyclic loading. Three interior beam-column subassemblies chosen to vary in concrete type and compressive strength are designed as per the New Zealand Standard NZ3101:2006. The specimens are instrumented to measure the load, displacement/drift, ductility, joint shear deformations, and elongation of the plastic hinge zone. The cracking pattern at different load levels and the mode of failure are also recorded and compared among different specimens.

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Mechanical and fresh properties of high-strength self-compacting concrete containing class C fly ash

Cited by 62 publications

References 14 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

Mechanical and durability properties of self‐compacting mortars containing binary and ternary mixes of fly ash and silica fume

Seismic Performance of High-Strength Self-Compacting Concrete in Reinforced Concrete Beam-Column Joints

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