Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar
The objective of this study is to develop and characterize kaolinite clay-based structural mortar. The pozzolanic reaction induced from two mineral additives, i.e., calcium hydroxide and silica fume (SF), and the physical filling effect from SF, were found to be effective on the enhancement of struc...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2017-05-01
|
Series: | Applied Sciences |
Subjects: | |
Online Access: | http://www.mdpi.com/2076-3417/7/5/522 |
id |
doaj-20530b0b7d0e4d5d9b70efdb122c02b6 |
---|---|
record_format |
Article |
spelling |
doaj-20530b0b7d0e4d5d9b70efdb122c02b62020-11-24T21:44:29ZengMDPI AGApplied Sciences2076-34172017-05-017552210.3390/app7050522app7050522Intensified Pozzolanic Reaction on Kaolinite Clay-Based MortarYang-Hee Kwon0Sung-Hoon Kang1Sung-Gul Hong2Juhyuk Moon3Department of Architecture & Architectural Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, KoreaDepartment of Architecture & Architectural Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, KoreaDepartment of Architecture & Architectural Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, KoreaDepartment of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576, SingaporeThe objective of this study is to develop and characterize kaolinite clay-based structural mortar. The pozzolanic reaction induced from two mineral additives, i.e., calcium hydroxide and silica fume (SF), and the physical filling effect from SF, were found to be effective on the enhancement of structural properties. Based on several preliminary experiments, 7:3 ratio of kaolinite clay/calcium hydroxide was selected as a basic binder. Then, the amount of SF was chosen as 0%, 7.5%, and 15% of the total binder to consider both the chemical and physical effects. The results showed that compressive strengths of samples with 7.5% and 15% SF are significantly increased by approximately 200% and 350%, respectively, at 28 days compared to the sample without SF. However, based on the results of the sample with 15% SF, it is found that excessive addition of SF causes long-term strength loss, possibly owing to micro cracks. With the careful consideration on this long-term behavior, this suggested new mix design can be further extended to develop sustainable structural materials using natural minerals or waste materials with nonbinding properties.http://www.mdpi.com/2076-3417/7/5/522cementless mortarsilica fumekaolinite claypozzolanic reactioncompressive strengthmicrostructure |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yang-Hee Kwon Sung-Hoon Kang Sung-Gul Hong Juhyuk Moon |
spellingShingle |
Yang-Hee Kwon Sung-Hoon Kang Sung-Gul Hong Juhyuk Moon Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar Applied Sciences cementless mortar silica fume kaolinite clay pozzolanic reaction compressive strength microstructure |
author_facet |
Yang-Hee Kwon Sung-Hoon Kang Sung-Gul Hong Juhyuk Moon |
author_sort |
Yang-Hee Kwon |
title |
Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar |
title_short |
Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar |
title_full |
Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar |
title_fullStr |
Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar |
title_full_unstemmed |
Intensified Pozzolanic Reaction on Kaolinite Clay-Based Mortar |
title_sort |
intensified pozzolanic reaction on kaolinite clay-based mortar |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2017-05-01 |
description |
The objective of this study is to develop and characterize kaolinite clay-based structural mortar. The pozzolanic reaction induced from two mineral additives, i.e., calcium hydroxide and silica fume (SF), and the physical filling effect from SF, were found to be effective on the enhancement of structural properties. Based on several preliminary experiments, 7:3 ratio of kaolinite clay/calcium hydroxide was selected as a basic binder. Then, the amount of SF was chosen as 0%, 7.5%, and 15% of the total binder to consider both the chemical and physical effects. The results showed that compressive strengths of samples with 7.5% and 15% SF are significantly increased by approximately 200% and 350%, respectively, at 28 days compared to the sample without SF. However, based on the results of the sample with 15% SF, it is found that excessive addition of SF causes long-term strength loss, possibly owing to micro cracks. With the careful consideration on this long-term behavior, this suggested new mix design can be further extended to develop sustainable structural materials using natural minerals or waste materials with nonbinding properties. |
topic |
cementless mortar silica fume kaolinite clay pozzolanic reaction compressive strength microstructure |
url |
http://www.mdpi.com/2076-3417/7/5/522 |
work_keys_str_mv |
AT yangheekwon intensifiedpozzolanicreactiononkaoliniteclaybasedmortar AT sunghoonkang intensifiedpozzolanicreactiononkaoliniteclaybasedmortar AT sunggulhong intensifiedpozzolanicreactiononkaoliniteclaybasedmortar AT juhyukmoon intensifiedpozzolanicreactiononkaoliniteclaybasedmortar |
_version_ |
1725909894386679808 |