Effect of superplasticiser type on the properties of cement grouts

Anagnostopoulos, Costas A.

doi:10.1680/adcr.14.00001

Cited by 12 publications

(3 citation statements)

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“…Various chemical admixtures such as superplasticisers, accelerators, anti-freezes, air-entraining agents, stabilisers and many others are utilised to modify grout properties according to the in situ conditions and the grouting purpose (Akbulut and Saglamer, 2003;Allan and Kukacka, 1995;Anagnostopoulos, 2015;Boel and Schutter, 2006;Chuaqui and Bruce, 2003;Kazemian et al, 2011;Sahmaran et al, 2008;Saric-Coric et al, 2003;Yahia and Khayat, 2003). In recent years, powdered emulsions and water-soluble polymers such as ethylene vinyl acetate, styrene-butadiene rubber and polyacrylic ester have been incorporated into cement mixes due to their potential influence on rheological properties (Allan, 1997), strength (Bureau et al, 2001), durability (Ohama, 1998), impermeability (Gao et al, 2002) and resistance to chemical erosion (Hatzitrifon and Anagnostopoulos, 2000).…”

Section: Introductionmentioning

confidence: 99%

Effect of acrylic latex on the properties of cement grouts

Anagnostopoulos

Patsios

2019

Proceedings of the Institution of Civil Engineers - Constructio

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The main objective of this comprehensive laboratory project was to investigate the potential use of acrylic latex to improve the physical and mechanical properties of thick superplasticised cement grouts. Experiments were conducted using different acrylic latex dosages with cement grouts that were prepared with water to cement ratios of 0·5, 0·4 and 0·33. The results indicated that the addition of acrylic latex of up to 5% significantly increases the 28 and 90 d strength, despite an extension of the setting time. The bleeding and resistance to acid attack of acrylic latex modified grouts were significantly improved. Grouts containing acrylic latex had much a higher viscosity and yield stress than the un-modified grouts. However, acrylic latex reduces the viscosity and yield stress of grouts that were prepared with water to cement ratios of 0·5 and 0·4 when added in small amounts. Based on the experimental results, nonlinear regression analysis was performed to correlate the physical and mechanical parameters of the acrylic latex modified grouts and the descriptor variables.

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Section: Introductionmentioning

confidence: 99%

Effect of acrylic latex on the properties of cement grouts

Anagnostopoulos

Patsios

2019

Proceedings of the Institution of Civil Engineers - Constructio

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“…Nowadays, different chemical admixtures, for example, plasticisers, superplasticisers, viscosity-modifying agents, accelerators, anti-freezers, air-entrainers, volume stabilisers and numerous others, have been used extensively to adjust the properties of grouts as indicated by the worksite conditions and the aims of the grouting project [6][7][8][9][10][11][12][13][14]. Lately, there have been many types of water-soluble polymers and water-dispersed polymeric particles (latexes) being incorporated into mortars or concretes in order to improve their fluidity [15], mechanical properties [16], impact and abrasion resistance [17], waterproofness [18] and resistance to corrosive environments [19].…”

Section: Introductionmentioning

confidence: 99%

Study on High Performance Polymer-Modified Cement Grouts

Anagnostopoulos

Dimitriadi

2021

CivilEng

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Engineers worldwide use various additives or chemical admixtures, such as polymer latexes, to improve the properties of cementitious materials for many construction projects. In this paper, the influence of acrylic or epoxy resin emulsions, along with a polycarboxylate superplasticiser on some basic properties (rheological behaviour, setting time, bleeding, strength) of thick cement grouts is presented. The experimental approach included the use of different polymer dosages mixed with grouts made of low water to cement ratios. The laboratory tests revealed that the incorporation of acrylic resin in grouts marginally affected the viscosity, whereas a significant increase in viscosity was obtained when an epoxy resin was added. Regardless of the prolonged setting times, both polymers improved the development of early or final strength. An acrylic resin dosage ranging from 0.25% to 0.75% and an epoxy resin dosage from 5% to 7.5% displayed the highest strength values, at all water to cement ratios. Additionally, all the polymer-modified grouts exhibited a higher bleed capacity, a fact that is significantly important where the bleeding of the grouts is crucial.

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“…The paper by Anagnostopoulos (2015) presents a laboratory study of the effects of a polycarboxylate superplasticiser on the rheological and mechanical properties.…”

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Editorial

Lothenbach¹

2015

Advances in Cement Research

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Concrete, based mainly on Portland cement, is the most widely used building material. The manufacturing of Portland cement causes 5% of the carbon dioxide emissions worldwide, even though per tonne of concrete much less CO 2 is set free than, for example, by the production of the same amount of steel or aluminium. The problem lies in the quantity, every year three billion tons of cement is produced throughout the world and the trend continues upwards. One way of reducing CO 2 emissions related to cement production is by using alternative raw materials with lower carbon content or industrial by-products and, in addition, ensuring that structures built last longer. To optimise a better understanding of cement and concrete, research on all aspects of cementitious materials is mandatory. The topical content of this issue of Advances in Cement Research reflects the broadness of various aspects of cement-based materials.Mineralisers can be used to lower clinkering temperature and thus to reduce energy consumption. The contribution of Agarwal et al. (2015) demonstrates that the use of jarosite, a by-product of the zinc industry, as a mineraliser allows a lowering of the temperature needed for clinkering and how, at a constant temperature, the use of jarosite results in enhanced alite formation and increased compressive strength of mortar samples.The blending with alternative materials lowers the clinker factor in the cement. Generally, limestone, fly ash or blast furnace slags are used. However, the use of glass powder can also contribute to the compressive strength of cement pastes, refine porosity and decrease expansion related to alkali silica reaction of mortars, as demonstrated in the paper by Liu et al. (2015).There is an increasing interest in the development and characterisation of alternatives to Portland cement as a binder in concrete. Alternative binders such as calcium aluminate and calcium sulfoaluminate cements, alkali-activated or supersulfated cements have been studied extensively. The paper by Murmu and Singh (2015) reports on the strength and hydration products of ground granulated blast-furnace slag activated with lime and calcium sulfate.Calcium silicate hydrates (CSH) are the main phase in hydrated cements and strongly influence the mechanical properties of cementitious materials. The structural, dynamic and mechanical properties of CSH are addressed by molecular dynamics in this issue of Advances in Cement Research in the paper by Hou and Li (2015).Microbial-induced calcium carbonate formation as a method for the protection of cement-based materials is the topic of the contribution of Senthilkumar et al. (2015). The formation of calcium carbonate by microorganisms from different calcium sources (calcium hydroxide, calcium acetate, calcium chloride and calcium oxide) is investigated. The surface treatment by microorganisms showed promising prospects for increasing strength and durability.The use of superplasticisers plays an important role in the production of denser and thus more durable mortars a...

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Effect of superplasticiser type on the properties of cement grouts

Cited by 12 publications

References 35 publications

Effect of acrylic latex on the properties of cement grouts

Effect of acrylic latex on the properties of cement grouts

Study on High Performance Polymer-Modified Cement Grouts

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