Effect of Coating with Flexible Polymer Modified Cement Mortar on Inhibition of Alkali Silica Reaction

The alkali–silica reaction (ASR) causes internal corrosion of concrete. The aim of this work is to verify the possibility of ultrasonic method in detection of concrete internal structure changes, which were initiated by the alkali-silica reaction. For this purpose, we prepared samples that contained aggregates of two types, namely one with 98% of SiO2 content and one with a greywacke. The dependence of ultrasonic impulse propagation velocity on the changes in the structure of mortars containing aggregates from these rocks was researched. The results of this work are not unambiguous yet and therefore it is necessary to carry out more extensive investigation with using of other methods that will allow to examine changes in the internal structure of composites more detailed.

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Polymer action on alkali–silica reaction in cement mortar

Cement and Concrete Research ◽

10.1016/j.cemconres.2012.09.008 ◽

2013 ◽

Vol 44 ◽

pp. 97-105 ◽

Cited By ~ 5

Author(s):

João Feiteira ◽

Maria S. Ribeiro

Keyword(s):

Cement Mortar ◽

Alkali Silica Reaction

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Characteristics of alkali–silica reaction according to substitution ratios of limestone powder in cement mortar

Materials Research Innovations ◽

10.1179/1432891715z.0000000001725 ◽

2015 ◽

Vol 19 (sup8) ◽

pp. S8-474-S8-478

Author(s):

S. Kim ◽

C. Park ◽

K.-K. Yun ◽

E. Choi

Keyword(s):

Cement Mortar ◽

Limestone Powder ◽

Alkali Silica Reaction

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Preparation of Flexible Polymer-Cement Mortar

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.299-300.708 ◽

2011 ◽

Vol 299-300 ◽

pp. 708-711 ◽

Cited By ~ 1

Author(s):

Shi An Sun ◽

Yi Wei Fei ◽

Yun Peng Xiao ◽

Hong Wei Yang ◽

Zhi Min Zong

Keyword(s):

Composite Materials ◽

Cement Mortar ◽

Impact Resistance ◽

Polymer Emulsion ◽

Flexible Polymer

A new flexible polymer-cement mortar was prepared by adjusting the ratio of cement, polymer emulsion and solution. The effects of cement and different kinds of polymer emulsion on the construction performance of composite materials such as workability, anti-aging, flexibility and impact resistance were evaluated. It was indicted that the prepared flexible polymer-cement mortar possessed a good application prospect.

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Activation Energy of Alkali-Silica Reactionin CFBC Fly Ash Geopolymer Mortars

Materials Science Forum ◽

10.4028/www.scientific.net/msf.882.77 ◽

2017 ◽

Vol 882 ◽

pp. 77-82 ◽

Cited By ~ 1

Author(s):

Chang Seon Shon ◽

Dongoun Lee

Keyword(s):

Activation Energy ◽

Fly Ash ◽

Cement Mortar ◽

Alkali Silica Reaction ◽

Fluidized Bed Combustion ◽

Binding Properties ◽

Different Temperatures ◽

Naoh Solution ◽

Cfbc Fly Ash ◽

High Sulfate

The utilization of fly ashes produced by circulated fluidized bed combustion (CFBC) has been limited in construction application due to their inherent high sulfate and carbon contents although CFBC fly ash exhibits very good binding properties without requiring any supplementary activator. This study reports alkali silica reaction (ASR) behavior of CFBC fly ash geopolymer mortars in terms of activation energy using a modified ASTM C 1260/C 1567. Two different strengths of NaOH solution were used to test reactive and potentially reactive aggregates in the presence of CFBC fly ash. The other variables included a longer test period of 3 months and three different temperatures, namely 60°C, 70°C, and 80°C. It was observed that there was no significant expansion in CFBC fly ash based geopolymer mortar regardless of variation of temperature and alkalinity of test solution. Activation energy of CFBC fly ash geopolymer for ASR was higher than that of plain cement mortar irrespective of strength of NaOH solution.

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