Drying shrinkage properties of expanded polystyrene (EPS) lightweight aggregate concrete: A review

Maghfouri, Mehdi; Alimohammadi, Vahid; Gupta, Rishi; Saberian, Mohammad; Azarsa, Pejman; Hashemi, Mohammad; Asadi, Iman; Roychand, Rajeev

doi:10.1016/j.cscm.2022.e00919

Cited by 22 publications

(19 citation statements)

References 53 publications

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“…A large number of evenly distributed tiny bubbles can relieve the compressive stress on the solid phase particles due to an increased surface tension, which helps to reduce the drying shrinkage and deformation of concrete [ 78 ]. Maghfouri et al [ 79 ] found through experiments that as the bubble content increased, concrete was less likely to undergo drying shrinkage and deformation. Although this trend is not obvious in the early stages of dehydration and drying (before 7 d), the later change trend is significant, as shown in Figure 27 .…”

Section: Effect Of Bubbles On Concrete Propertiesmentioning

confidence: 99%

Bubble Evolution under the Action of Polycarboxylate and Air-Entraining Agent and Its Effects on Concrete Properties—A Review

et al. 2022

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In order to improve the performance of concrete, it is of great significance to have a better understanding the mechanism and main influencing factors of concrete bubble evolution under the action of polycarboxylate and air-entraining agents. In the present review, with respect to the generation, growth, stability, and rupture of concrete bubbles under the action of polycarboxylate and air-entraining agents, this paper discusses the influence of bubble characteristics on concrete performance and studies bubble regulation by air-entraining agents and polycarboxylate (PCE) superplasticizer. The results show that the acid-to-ether ratio, sulfonic acid group, ester group, and the type of air entraining agent of the polycarboxylate acid structure have a significant impact on the bubbles. The bubble size, specific area, spacing factor, and bubble content have a significant impact on the rheological properties and related mechanical properties of fresh concrete and also affect the appearance quality of concrete. The problems with the experimental methods and theoretical models of concrete bubble research were analyzed, and future research ideas were put forward.

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Section: Effect Of Bubbles On Concrete Propertiesmentioning

confidence: 99%

Bubble Evolution under the Action of Polycarboxylate and Air-Entraining Agent and Its Effects on Concrete Properties—A Review

et al. 2022

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“…Based on the analysis of existing experiences on the use of expanded polystyrene concrete in construction, it may be concluded that this material was carried out mainly in producing prefabricated structures under factory conditions [1][2]. In this regard, one would be particularly interested in studying the potential use of expanded polystyrene concrete in the monolithic construction of buildings [3][4].…”

Section: Introductionmentioning

confidence: 99%

Technology for erecting monolithic enclosing structures of buildings made of expanded polystyrene concrete

2023

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This work aims to develop effective technology for erecting monolithic enclosing structures of buildings made of expanded polystyrene concrete. As a result of the research carried out, a model of large-panel formwork made of ABS plastic for concreting monolithic walls with an expanded polystyrene concrete mixture was developed, representing rectangular panels of a size of 3000 x 1200 x 40 mm. To ensure the necessary strength and rigidity, the outer side of the formwork is made cellular with a large number of longitudinal and transverse stiffeners placed in increments of 300 mm. We have developed a technology for erecting monolithic enclosing structures of buildings made of expanded polystyrene concrete using a mobile concrete-mixing unit. The following are technical and economic indicators for manufacturing monolithic walls out of expanded polystyrene concrete of a volume of 46 m3 : the cost is 354.784 thousand rubles, and the labor intensity and unit capacity are 163.76 people.*h and 27.36 units.*h, respectively. The results significantly offer the construction industry a solution to reduce the labor intensity of construction and installation while manufacturing cost-effective monolithic enclosing structures for buildings.

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“…This substantial growth in the plastic waste leads to the way of reusing and recycling. In the current scenario, usage of waste materials has become popular in the construction industry (5) .…”

Section: Introductionmentioning

confidence: 99%

Effect of Polystyrene Waste on Concrete at Elevated Temperature

Rajaram¹,

Kandasamy²,

Ravichandran³

et al. 2022

IJST

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Objectives:The purpose of the present study is to examine the thermal and impact behaviour of the concrete containing polystyrene waste as aggregates. Methods: The concrete specimens were cast and cured in a conventional way to examine the mechanical behaviour of the concrete. A separate equipment was prepared to determine the impact strength of the concrete as per ASTM D5420-21. The thermal behaviour of the concrete with plastic aggregates were also examined with reference to IS 7861-1 (1975). Artificial Neural Network was also used to predict and compare the properties between both the conventional and plastic concrete. Findings: The mechanical behaviour of the concrete behaves well at Mix 2 when compared to other mixes. The impact strength of the concrete was found to be 98.375 J at Mix3 which was 20.69% higher than the Mix2. At Mix2 the 7 days compression strength in elevated temperature is 16.79 N/mm 2 which was 4.8% higher than the Mix 1 and 31.74% higher than the Mix 3. At 28 days, the compressive strength of concrete containing 50% replacement of aggregate exposed to temperature 50 o c for 24 hours is 26.84 N/mm 2 which shows a better result and resistance in the thermal condition than the other mixes. ANN also gives reliable predicted values which exhibits a clear relation with the inclusion of the plastic aggregate and concrete matrix with some minimum errors. Novelty: From the experimental investigation it was observed that the plastic concrete fails in the transition zone of concrete due to the weaker bonding between the plastic aggregate and cement matrix. The plastic aggregate has not undergone any crushing failure in the concrete specimens when compared to the conventional aggregate. Thus, this solid polystyrene waste can be used as an alternative material for coarse aggregate in concrete.

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Drying shrinkage properties of expanded polystyrene (EPS) lightweight aggregate concrete: A review

Cited by 22 publications

References 53 publications

Bubble Evolution under the Action of Polycarboxylate and Air-Entraining Agent and Its Effects on Concrete Properties—A Review

Bubble Evolution under the Action of Polycarboxylate and Air-Entraining Agent and Its Effects on Concrete Properties—A Review

Technology for erecting monolithic enclosing structures of buildings made of expanded polystyrene concrete

Effect of Polystyrene Waste on Concrete at Elevated Temperature

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