A comprehensive investigation into the effect of water to cement ratio and powder content on mechanical properties of self-compacting concrete

Nikbin, Iman M.; Beygi, M.H.A.; Kazemi, Mohammad Taghi; Amiri, Javad Vaseghi; Rabbanifar, Saeed; Rahmani, E.; Rahimi, Shaban

doi:10.1016/j.conbuildmat.2014.01.098

Cited by 93 publications

(31 citation statements)

References 55 publications

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“…Over the last decades, SCC as a new generation of high-performance concrete, has been known as a significant progress in concrete industry and consequently considered as the subject of extensive research studies (Nikbin et al 2014). SCC's unique property gives it significant constructability, economic and engineering advantages (Uysal 2012;Mahmoud et al 2013;Lotfy et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Utilization of Waste Glass Micro-particles in Producing Self-Consolidating Concrete Mixtures

Sharifi

Afshoon

Firoozjaei

et al. 2016

Int J Concr Struct Mater

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The successful completion of the present research would be achieved using ground waste glass (GWG) microparticles in self-consolidating concrete (SCC). Here, the influences of GWG microparticles as cementing material on mechanical and durability response properties of SCC are investigated. The aim of this study is to investigate the hardened mechanical properties, percentage of water absorption, free drying shrinkage, unit weight and Alkali Silica Reaction (ASR) of binary blended concrete with partial replacement of cement by 5, 10, 15, 20, 25 and 30 wt% of GWG microparticles. Besides, slump flow, V-funnel, L-box, J-ring, GTM screen stability, visual stability index (VSI), setting time and air content tests were also performed as workability of fresh concrete indicators. The results show that the workability of fresh concrete was increased by increasing the content of GWG microparticles. The results showed that using GWG microparticles up to maximum replacement of 15 % produces concrete with improved hardened strengths. From the results, when the amount of GWG increased there was a gradual decrease in ASR expansion. Results showed that it is possible to successfully produce SCC with GWG as cementing material in terms of workability, durability and hardened properties.

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Section: Introductionmentioning

confidence: 99%

Utilization of Waste Glass Micro-particles in Producing Self-Consolidating Concrete Mixtures

Sharifi

Afshoon

Firoozjaei

et al. 2016

Int J Concr Struct Mater

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“…The small size (3-10 lm) of single microcapsules can fill the cavity between aggregates, leading to improved particle packing density and decrease the porosity (first effect) [31][32][33]. On the other hand, the hydrophobic nature of LDPE-EVA/RT27 may cause an opposite effect.…”

Section: Mpcm-concrete Density and Porositymentioning

confidence: 99%

Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications

Cao

Pilehvar

Salas-Bringas

et al. 2017

Energy Conversion and Management

241

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a b s t r a c tConcretes with a high thermal energy storage capacity were fabricated by mixing microencapsulated phase change materials (MPCM) into Portland cement concrete (PCC) and geopolymer concrete (GPC). The effect of MPCM on thermal performance and compressive strength of PCC and GPC were investigated. It was found that the replacement of sand by MPCM resulted in lower thermal conductivity and higher thermal energy storage, while the specific heat capacity of concrete remained practically stable when the phase change material (PCM) was in the liquid or solid phase. Furthermore, the thermal conductivity of GPC as function of MPCM concentration was reduced at a higher rate than that of PCC. The power consumption needed to stabilize a simulated indoor temperature of 23°C was reduced after the addition of MPCM. GPC exhibited better energy saving properties than PCC at the same conditions. A significant loss in compressive strength was observed due to the addition of MPCM to concrete. However, the compressive strength still satisfies the mechanical European regulation (EN 206-1, compressive strength class C20/25) for concrete applications. Finally, MPCM-concrete provided a good thermal stability after subjecting the samples to 100 thermal cycles at high heating/cooling rates.

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“…Thus study of tensile strength is very important in predicting the cracking behavior of structures in its design. It is known that increasing the w/c ratio from 0.35 to 0.7 in SCC, decreases the tensile strength of concrete by about 51% [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Iqbal¹,

Ali²,

Holschemacher³

et al. 2016

Period. Polytech. Civil Eng.

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IntroductionAs known, self-compacting concrete (SCC) is highly flowable, non-segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. It doesn't require any vibration for compaction and can flow through narrow spaces without segregation and excessive bleeding [1]. Therefore SCC is one of the greatest innovations of concrete technology. It was introduced in construction industry in early 1990s. Similar to the normal vibrated concrete (NVC), SCC mixtures consist of aggregate, cement, water, admixtures and some mineral additions. Unlike NVC, SCC has high quantity of fillers (eg. silica fume, fly ash, limestone powder etc.) and superplasticizer (high-range water reducing admixture) added to improve its flowing property.As SCC flows under its own weight without or very little use of vibration, it results in saving a lot of labor effort and bring economy to the concreting. Moreover, it can also flow through narrow and complex geometries where the use of vibrator is almost impossible.Use of SCC in construction industry is getting more and more popularity all over the world because of inherited advantages and studies on its hardened properties. SCC can be classified mainly into 3 different types [2]:• powder type;• viscosity type and • combination type The first type has a high amount of powder (all material <0.15 mm) ranging from 550-650 kg/m 3 , which provides the plastic viscosity and thus resistance to segregation whereas the yield point is determined by the addition of suitable superplasticizers. In the second type there is less powder content ranging from 350-450 kg/m 3 . In this type additional minerals or fillers are not used for segregation resistance. An admixture called viscosity modifying agent (VMA) is used to control the segregation, while yield point is controlled by the superplasticizer. The third type has a powder content of 450-550 kg/m 3 , but additionally rheology is controlled by the use of appropriate dosage of VMA and superplasticizer.

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A comprehensive investigation into the effect of water to cement ratio and powder content on mechanical properties of self-compacting concrete

Cited by 93 publications

References 55 publications

Utilization of Waste Glass Micro-particles in Producing Self-Consolidating Concrete Mixtures

Utilization of Waste Glass Micro-particles in Producing Self-Consolidating Concrete Mixtures

Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

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