Influence of recycled sand and gravel on the rheological and mechanical characteristic of concrete

Tahar, Zine-el-abidine; Kadri, El-Hadj; Ngo, Tien-Tung; Bouvet, Adrien; Kaci, Abdelhak

doi:10.1080/01694243.2015.1101185

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…As may be seen in the lineal adjustment (see equation y = Ax for each model in the Fig. 13), the results predicted by Kakizaki and those of the ACI code achieved the best fit with the results that were obtained experimentally, with a relation close to 1 as indicated by parameter A [83,84].…”

Section: (4)mentioning

confidence: 53%

The influence of recycled aggregates from precast elements on the mechanical properties of structural self-compacting concrete

Fiol

Thomas

Muñoz

et al. 2018

Construction and Building Materials

110

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The construction industry is one of the sectors bearing the greatest responsibility for the consumption of natural resources and the generation of waste. Construction and demolition is one of the principal focuses of attention in the search for sustainable construction. Mean average production in Europe of Construction and Demolition Waste (CDW) stands at 0.38 t/per person/per year, and only countries such as Denmark and the Netherlands have recycling rates of over 85%. >35 million tons of CDW (1.1 t/per person/per year) are produced in Spain alone [1]. With regard to prefabricated concretes at an international level, the "Precast Sustainability Strategy and Charter" of the British Precast Concrete Federation is first and foremost [2]. This plan encourages precast firms to go beyond the requirements of current legislation, by instituting measures on a voluntary basis to add greater sustainability to their products and operations. In 2013, the British Precast Council approved a new battery of measures for implementation throughout the year. The Netherlands and Germany may be highlighted in Europe among the countries that opt for the precast industry, where precast solutions in construction amount to 45% and 38%, respectively [3]. An effort is made to comply with the basic requirement for "sustainable use of natural resources", included in EU Regulation 305/2011 [4] on harmonized conditions for the marketing of construction products. The European Regulation under article 11.2b [4] also includes the objective for Member states to adopt certain measures, among which: to guarantee recycling to a minimum of 70% by weight of Construction and Demolition Wastes (CDW) before 2020. The promotion of research studies related to the sustainability of companies dedicated to concrete products through the incorporation of recycled aggregates is an incentive and an advance for society. A large number of investigations have arisen from the exploitation of these waste products, in which the different forms of using Recycled Aggregates (RA) in the manufacture of concrete have been analysed [5-8], but there are few studies that use RA The influence of recycled aggregates from precast elements on the mechanical properties of structural self-compacting concrete F. Fiol a, ⁎

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Section: (4)mentioning

confidence: 53%

The influence of recycled aggregates from precast elements on the mechanical properties of structural self-compacting concrete

Fiol

Thomas

Muñoz

et al. 2018

Construction and Building Materials

110

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“…After being added to the concrete, the water reducer is absorbed on the surface of mud powder with anionic groups. In many cases, the mud power outperforms the cement in the adsorption capacity and adsorption rate of water reducer [11]. Therefore, it is very meaningful to study the effects of the mud in sand and gravel on the performance of water-reducing agent.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mud Content in Sand and Gravel on Water Reducer in Concrete

Wang¹

2019

ACSM

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The mud content in sand and gravel suppresses the fluidity and water reducer effect of concrete. To disclose the impacts of mud content on water reducer, this paper explores the microscale interaction between three kinds of mud (i.e. montmorillonite, kaolin and illite) and one water reducer (i.e. polycarboxylate superplasticizer), and tests the compressive strength and porosity of cement mortar with each type of mud. In addition, an anti-mud agent was prepared to enhance the dispersion effect of the water reducer. The results show that the compressive strength of hardened cement mortar is negatively correlated with mud content. The equilibrium zeta potential of two types of mud is higher than that of cement particles. The optimal reaction conditions for the anti-mud agent are weak alkalinity, reaction temperature of 70 °C, initiator dosage of 6 %, and reaction time of 5h. The research findings provide new insights into the development and application of water reducer with anti-mud agent.

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Effect of cement and admixture on the utilization of recycled aggregates in concrete

Tahar

Ngo

Kadri

et al. 2017

Construction and Building Materials

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Influence of recycled sand and gravel on the rheological and mechanical characteristic of concrete

Cited by 10 publications

References 32 publications

The influence of recycled aggregates from precast elements on the mechanical properties of structural self-compacting concrete

The influence of recycled aggregates from precast elements on the mechanical properties of structural self-compacting concrete

Influence of Mud Content in Sand and Gravel on Water Reducer in Concrete

Effect of cement and admixture on the utilization of recycled aggregates in concrete

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