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A platform for research: civil engineering, architecture and urbanism
Effect of internal curing with super absorbent polymers on autogenous shrinkage of concrete at early age
https://orcid.org/0000-0002-0283-6835
Graphical abstract The proposed model to estimate the AS of internally cured concrete with SAP considering the early-age expansion and amount of IC water indicated good correspondence with the experimental results. Display Omitted
Highlights AS of internally cured concrete with SAP at early age was investigated. The prediction model for early-age expansion of concrete with SAP was proposed. The AS rate of concrete with SAP decreased with the increase of amount of IC water. The prediction model for AS was proposed considering expansion and IC water. The IC efficiency of SAP was evaluated.
Abstract High-performance concrete (HPC) is used extensively in practice. However, this type of concrete has a low water-to-cement (w/c) ratio, which causes self-desiccation and leads to a rather high autogenous shrinkage (AS). AS then increases the risk of cracking if the concrete is restrained from shrinking freely at early age. Internal curing (IC) has been extensively used in reducing AS and consequently mitigating the high risk of early-age cracking of HPC. Super absorbent polymers (SAPs) can supply additional IC water for hydration of concrete, thereby counteracting the effects of self-desiccation. Although experimental studies were conducted to mitigate the AS of internally cured concrete with SAP, research on the relationship between the AS of concrete and the amount of IC water provided by SAP is still lacking. Thus, an experimental study on the effect of IC on the early age expansion, AS development, AS rate, and IC efficiency of concrete with SAP was conducted. Test results showed that (1) the early-age expansion occurred obviously prior to the first day for the internally cured concrete, and the maximum expansion increased with the increase of IC water; (2) the ultimate AS at 28days and AS rate of internally cured concrete decreased with the increase of the amount of IC water; (3) the proposed model to estimate the AS of internally cured concrete with SAP considering the early-age expansion and amount of IC water indicated good correspondence with the experimental results; and (4) the IC efficiency of SAP decreased with the increase of IC water in concrete.
Effect of internal curing with super absorbent polymers on autogenous shrinkage of concrete at early age
https://orcid.org/0000-0002-0283-6835
Graphical abstract The proposed model to estimate the AS of internally cured concrete with SAP considering the early-age expansion and amount of IC water indicated good correspondence with the experimental results. Display Omitted
Highlights AS of internally cured concrete with SAP at early age was investigated. The prediction model for early-age expansion of concrete with SAP was proposed. The AS rate of concrete with SAP decreased with the increase of amount of IC water. The prediction model for AS was proposed considering expansion and IC water. The IC efficiency of SAP was evaluated.
Abstract High-performance concrete (HPC) is used extensively in practice. However, this type of concrete has a low water-to-cement (w/c) ratio, which causes self-desiccation and leads to a rather high autogenous shrinkage (AS). AS then increases the risk of cracking if the concrete is restrained from shrinking freely at early age. Internal curing (IC) has been extensively used in reducing AS and consequently mitigating the high risk of early-age cracking of HPC. Super absorbent polymers (SAPs) can supply additional IC water for hydration of concrete, thereby counteracting the effects of self-desiccation. Although experimental studies were conducted to mitigate the AS of internally cured concrete with SAP, research on the relationship between the AS of concrete and the amount of IC water provided by SAP is still lacking. Thus, an experimental study on the effect of IC on the early age expansion, AS development, AS rate, and IC efficiency of concrete with SAP was conducted. Test results showed that (1) the early-age expansion occurred obviously prior to the first day for the internally cured concrete, and the maximum expansion increased with the increase of IC water; (2) the ultimate AS at 28days and AS rate of internally cured concrete decreased with the increase of the amount of IC water; (3) the proposed model to estimate the AS of internally cured concrete with SAP considering the early-age expansion and amount of IC water indicated good correspondence with the experimental results; and (4) the IC efficiency of SAP decreased with the increase of IC water in concrete.
Effect of internal curing with super absorbent polymers on autogenous shrinkage of concrete at early age
https://orcid.org/0000-0002-0283-6835
Graphical abstract The proposed model to estimate the AS of internally cured concrete with SAP considering the early-age expansion and amount of IC water indicated good correspondence with the experimental results. Display Omitted
Highlights AS of internally cured concrete with SAP at early age was investigated. The prediction model for early-age expansion of concrete with SAP was proposed. The AS rate of concrete with SAP decreased with the increase of amount of IC water. The prediction model for AS was proposed considering expansion and IC water. The IC efficiency of SAP was evaluated.
Abstract High-performance concrete (HPC) is used extensively in practice. However, this type of concrete has a low water-to-cement (w/c) ratio, which causes self-desiccation and leads to a rather high autogenous shrinkage (AS). AS then increases the risk of cracking if the concrete is restrained from shrinking freely at early age. Internal curing (IC) has been extensively used in reducing AS and consequently mitigating the high risk of early-age cracking of HPC. Super absorbent polymers (SAPs) can supply additional IC water for hydration of concrete, thereby counteracting the effects of self-desiccation. Although experimental studies were conducted to mitigate the AS of internally cured concrete with SAP, research on the relationship between the AS of concrete and the amount of IC water provided by SAP is still lacking. Thus, an experimental study on the effect of IC on the early age expansion, AS development, AS rate, and IC efficiency of concrete with SAP was conducted. Test results showed that (1) the early-age expansion occurred obviously prior to the first day for the internally cured concrete, and the maximum expansion increased with the increase of IC water; (2) the ultimate AS at 28days and AS rate of internally cured concrete decreased with the increase of the amount of IC water; (3) the proposed model to estimate the AS of internally cured concrete with SAP considering the early-age expansion and amount of IC water indicated good correspondence with the experimental results; and (4) the IC efficiency of SAP decreased with the increase of IC water in concrete.
Effect of internal curing with super absorbent polymers on autogenous shrinkage of concrete at early age
Shen, Dejian (author) / Wang, Xudong (author) / Cheng, Dabao (author) / Zhang, Jinyang (author) / Jiang, Guoqing (author)
Construction and Building Materials ; 106 ; 512-522
2015-12-16
11 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
Autogenous Shrinkage of Concrete with Super-Absorbent Polymer
| Online Contents | 2009
Autogenous Shrinkage of Concrete with Super-Absorbent Polymer
| British Library Online Contents | 2009