Internal curing of mortar with low water to cementitious materials ratio using a normal weight porous aggregate

Zou, Dinghua; Zhang, Haoran; Wang, Yuli; Zhu, Jianping; Guan, Xiaohong

doi:10.1016/j.conbuildmat.2015.08.025

Cited by 23 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mechanism which VMA provides internal curing to the cement paste is very similar to the ones reported to other materials with equivalent water retention, such as natural fibres [40,41], super absorbent polymers [42] or porous aggregates [43,44].…”

Section: Thermogravimetry Analysissupporting

confidence: 73%

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Figueiredo

Çopuroğlu

Schlangen

2019

Construction and Building Materials

View full text Add to dashboard Cite

Section: Thermogravimetry Analysissupporting

confidence: 73%

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Figueiredo

Çopuroğlu

Schlangen

2019

Construction and Building Materials

View full text Add to dashboard Cite

“…In another study, effectiveness of internal curing mechanism for making concrete pavement less susceptible to environmental conditions was showed by Chun and Kim (2015). Lower shrinkage and less damage of internally cured mortar were also observed by Zou and Weiss (2014) and Zou et al (2015) in two different studies. Therefore, benefits of internal curing can be summarized as enhanced hydration of cement, higher strength development, reduction of autogenous shrinkage and cracking, decrease in permeability, and improvement of durability etc.…”

Section: Introductionsupporting

confidence: 55%

“…Therefore, benefits of internal curing can be summarized as enhanced hydration of cement, higher strength development, reduction of autogenous shrinkage and cracking, decrease in permeability, and improvement of durability etc. (Bentz et al 2005;Manzur et al 2015;Bentz and Weiss 2010;de Sensale and Goncalves 2014;Chun and Kim 2015;Zou and Weiss 2014;Zou et al 2015;Geiker et al 2004). The impact of internal curing begins immediately during the initial hydration of the cement, with benefits that are observed at ages as early as two days.…”

Section: Introductionmentioning

confidence: 99%

Optimum Proportion of Masonry Chip Aggregate for Internally Cured Concrete

Iffat

Manzur

Rahman

et al. 2017

Int J Concr Struct Mater

View full text Add to dashboard Cite

Proper curing of concrete is essential for achieving desirable mechanical properties. However, in a developing country like Bangladesh, curing is often neglected due to lack of proper knowledge and skill of local contractors. Consequently, general concreting work of the country has been found to have both strength and durability issues. Under such scenario, internal curing could be adopted using masonry chip aggregate (MCA) which is quite common in this region. It is observed that saturated MCA desorbs water under favorable relative humidity and temperature. This paper presents the effectiveness of MCA as internal curing medium and recommends a tentative optimum mix proportion to produce such concrete. The experimental study was conducted in two phases. It was found that 20% replacement of stone chips with MCA produced better performing internally cured concrete both in terms of strength and durability. Performance of internally cured concrete with recommended proportion of MCA is comparable to that of normally cured control concrete samples with conventional stone chips. In addition, internally cured concrete performed significantly better than control samples when kept under similar adverse curing conditions. In the absence of supply of external water for curing, compressive strength of internally cured concrete for 20% replacement can be as high as 1.5 times the strength of the control concrete samples. Significant better performance in permeability than that of control samples was also observed for this percent replacement under such adverse curing conditions. Keywords: internal curing, lightweight aggregate, temperature, humidity, desorption, strength, permeability. Abbreviations IC

show abstract

“…For a long time, it was believed that fine fractions of recycled aggregate had low quality properties, so they were discarded [2]. However, recent studies have shown that the properties of fine recycled concrete aggregate do not differ significantly from those of coarse fractions and that the use of the former can bring benefits to the final material and the environment [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the use of pre-wetting fine recycled aggregate can alleviate these problems. There are few studies on pre-wetting of fine recycled aggregates intended for mortars [3,10,11,8]. In general, this method is still considered detrimental to the properties of the final material, so its use is avoided.…”

Section: Introductionmentioning

confidence: 99%

Effects of pre-wetting aggregate on the properties of mortars made with recycled concrete and lightweight aggregates

2019

View full text Add to dashboard Cite

This paper examines the suitability of partially replacing natural aggregate, sand, (NA) with recycled concrete aggregate (RCA) or lightweight aggregate (LWA) in mortars, under the hypothesis that pre-wetting aggregates would produce improvement in mortar properties. Fresh mortar properties such as density, entrained air content, consistency and heat of hydration, as well as hardened mortar properties such as dry density, compressive and flexural strength, and dimensional instability at 0% and 100% saturation were determined. The results show that mortars made with natural aggregate (75%) and recycled concrete aggregate (25%) have similar properties to mortars made with only natural aggregate (100%) and that pre-wetting the aggregates does not influence the properties of mortars significantly. Therefore, partial replacement with recycled concrete aggregate is a viable alternative for producing mortar.

show abstract

Internal curing of mortar with low water to cementitious materials ratio using a normal weight porous aggregate

Cited by 23 publications

References 21 publications

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Optimum Proportion of Masonry Chip Aggregate for Internally Cured Concrete

Effects of pre-wetting aggregate on the properties of mortars made with recycled concrete and lightweight aggregates

Contact Info

Product

Resources

About