Influence of superabsorbent polymer on shrinkage properties of reactive powder concrete blended with granulated blast furnace slag

Mo, Jinchuan; Ou, Zhongwen; Zhao, Xuxin; Wang, Yahui

doi:10.1016/j.conbuildmat.2017.04.105

Cited by 33 publications

(15 citation statements)

References 43 publications

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“…This could be attributed to the absorption characteristics of SAP. It was found that besides water, some alkali ions could be absorbed by SAP as well during the first few hours after mixing [50]. The implication is that the concentration of alkaliactivator could be affected by absorption behaviour of SAP, thus leading to delay of the main peak.…”

Section: Isothermal Reactionmentioning

confidence: 99%

Internal curing of alkali-activated fly ash-slag pastes using superabsorbent polymer

Zhu

Fang

et al. 2019

Cement and Concrete Research

113

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Section: Isothermal Reactionmentioning

confidence: 99%

Internal curing of alkali-activated fly ash-slag pastes using superabsorbent polymer

Zhu

Fang

et al. 2019

Cement and Concrete Research

113

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“…Average results of each batch of mixtures was reported by testing triplicate specimens. In order to prevent the influence of water evaporation on the surface of the pulp, the surface of the pulp should be covered with a plastic film throughout the process [ 38 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Internal Curing by Super Absorbent Polymer on the Autogenous Shrinkage of Alkali-Activated Slag Mortars

Wang

Chen

et al. 2020

Materials

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Alkali activated slag (AAS) mortar is becoming an increasingly popular green building material because of its excellent engineering properties and low CO2 emissions, promising to replace ordinary Portland cement (OPC) mortar. However, AAS’s high shrinkage and short setting time are the important reasons to limit its wide application in engineering. This paper was conducted to investigate the effect of internal curing(IC) by super absorbent polymer (SAP) on the autogenous shrinkage of AAS mortars. For this, an experimental study was carried out to evaluate the effect of SAP dosage on the setting time, autogenous shrinkage, compressive strength, microstructure, and pore structure. The SAP were incorporated at different dosage of 0, 0.05, 0.1, 0.2, 0.3, 0.4, and 0.5 percent by weight of slag. The workability, physical (porosity), mechanical, and shrinkage properties of the mortars were evaluated, and a complementary study on microstructure was made. The results indicated that the setting time increased with an increase of SAP dosage due to the additional activator released by SAP. Autogenous shrinkage decreased with an increase of SAP dosage, and was mitigated completely when the dosage of SAP ≥ 0.2% wt of slag. Although IC by means of SAP reduced the compressive strength, this reduction (23% at 56 days for 0.2% SAP) was acceptable given the important role that it played on mitigating autogenous shrinkage. In the research, the 0.2% SAP dosage was the optimal content. The results can provide data and basis for practical application of AAS mortar.

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“…Though being known for quite a long time, the maximum thickness reduction of paste has been used to optimize the RPC differently. Several works use quartz sands with a maximum size of 0.5 and 0.6 mm [1], [4], [6], [10], [15], [19], [23], 0.8 and 1.0 mm [17], [22], 3 mm [11], [12], [21] and even 4 mm [3].…”

Section: Compressive Strengthmentioning

confidence: 99%

Strength optimization of reactive powder concrete

Röhden

Kirchheim

Molin

2020

Rev. IBRACON Estrut. Mater.

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Recent reports on reactive powder concrete address important aspects regarding its performance. Several techniques are used to improve the design of such concretes. Ultra-high compressive strengths have been reported with the application of pre-setting pressure and autoclave curing. The objective of this work is to evaluate the use of very fine quartz powder to replace fine aggregate, nanosilica, and inorganic pigments to optimize mechanical properties of reactive powder concrete. The experimental work was developed in three distinct phases. In the first phase, mix-proportions of reactive powder concrete have been developed, considering different maximum aggregate sizes (1.2, 0.6, 0.075, and 0.045 mm). In the second phase, the influence of nanosilica on the properties of reactive powder concrete was evaluated. In the third phase, the effect of the addition of yellow, green, orange, and blue inorganic pigments to the reactive powder concrete mix-design was evaluated. Results show that the maximum aggregate size influences the compressive strength of the reactive powder concrete. A decrease from 1.2 mm to 0.045 mm in the maximum aggregate size resulted in 156 MPa increase in the compressive strength. The type of pigment did not significantly influence the compressive strength of the reactive powder concrete. The mix-proportion that resulted in the highest compressive strength (310.7 MPa) was designed using yellow pigment.

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Influence of superabsorbent polymer on shrinkage properties of reactive powder concrete blended with granulated blast furnace slag

Cited by 33 publications

References 43 publications

Internal curing of alkali-activated fly ash-slag pastes using superabsorbent polymer

Internal curing of alkali-activated fly ash-slag pastes using superabsorbent polymer

Effect of Internal Curing by Super Absorbent Polymer on the Autogenous Shrinkage of Alkali-Activated Slag Mortars

Strength optimization of reactive powder concrete

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