Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites
Concrete is porous; the partial pores in the internal structure of concrete are generated by hydration products, such as calcium hydroxide, dissolved in water. External harmful substances in the form of gases or aqueous solutions can penetrate concrete. The destruction of the internal structure of c...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2021-05-01
|
Series: | Crystals |
Subjects: | |
Online Access: | https://www.mdpi.com/2073-4352/11/6/587 |
id |
doaj-b4bea0eff3c34f32a5984e02aa7d3d6f |
---|---|
record_format |
Article |
spelling |
doaj-b4bea0eff3c34f32a5984e02aa7d3d6f2021-06-01T00:51:48ZengMDPI AGCrystals2073-43522021-05-011158758710.3390/cryst11060587Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based CompositesSung-Ching Chen0Si-Yu Zou1Hui-Mi Hsu2School of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, ChinaTaiwan Construction Research Institute, Taipei 23146, TaiwanDepartment of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, TaiwanConcrete is porous; the partial pores in the internal structure of concrete are generated by hydration products, such as calcium hydroxide, dissolved in water. External harmful substances in the form of gases or aqueous solutions can penetrate concrete. The destruction of the internal structure of concrete leads to problems such as shortening of the service life of concrete as well as the corrosion and poor durability of steel. To improve the pore structure of concrete, a material can be added to concrete mixtures to cause the secondary hydration of the hydration products of cement. This reaction is expected to reduce the pore volume and increase the density of concrete. For existing concrete structures, inorganic crystalline materials can be used to protect the surface and reduce the intrusion of external harmful substances. In this study, the water–binder ratio was 0.4 and 0.6. Three inorganic crystalline materials and recycled fine aggregates (0%, 10%, 20%, and 30% replacement of natural aggregates by weight) were used in the same cement-based composites. The results indicated that all specimens had a high total charge-passed value, and inorganic crystalline material C provided superior protection for green cement-based composites.https://www.mdpi.com/2073-4352/11/6/587recycled fine aggregatessealerdurabilitymercury intrusion porosimetry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sung-Ching Chen Si-Yu Zou Hui-Mi Hsu |
spellingShingle |
Sung-Ching Chen Si-Yu Zou Hui-Mi Hsu Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites Crystals recycled fine aggregates sealer durability mercury intrusion porosimetry |
author_facet |
Sung-Ching Chen Si-Yu Zou Hui-Mi Hsu |
author_sort |
Sung-Ching Chen |
title |
Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites |
title_short |
Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites |
title_full |
Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites |
title_fullStr |
Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites |
title_full_unstemmed |
Effects of Recycled Fine Aggregates and Inorganic Crystalline Materials on the Strength and Pore Structures of Cement-Based Composites |
title_sort |
effects of recycled fine aggregates and inorganic crystalline materials on the strength and pore structures of cement-based composites |
publisher |
MDPI AG |
series |
Crystals |
issn |
2073-4352 |
publishDate |
2021-05-01 |
description |
Concrete is porous; the partial pores in the internal structure of concrete are generated by hydration products, such as calcium hydroxide, dissolved in water. External harmful substances in the form of gases or aqueous solutions can penetrate concrete. The destruction of the internal structure of concrete leads to problems such as shortening of the service life of concrete as well as the corrosion and poor durability of steel. To improve the pore structure of concrete, a material can be added to concrete mixtures to cause the secondary hydration of the hydration products of cement. This reaction is expected to reduce the pore volume and increase the density of concrete. For existing concrete structures, inorganic crystalline materials can be used to protect the surface and reduce the intrusion of external harmful substances. In this study, the water–binder ratio was 0.4 and 0.6. Three inorganic crystalline materials and recycled fine aggregates (0%, 10%, 20%, and 30% replacement of natural aggregates by weight) were used in the same cement-based composites. The results indicated that all specimens had a high total charge-passed value, and inorganic crystalline material C provided superior protection for green cement-based composites. |
topic |
recycled fine aggregates sealer durability mercury intrusion porosimetry |
url |
https://www.mdpi.com/2073-4352/11/6/587 |
work_keys_str_mv |
AT sungchingchen effectsofrecycledfineaggregatesandinorganiccrystallinematerialsonthestrengthandporestructuresofcementbasedcomposites AT siyuzou effectsofrecycledfineaggregatesandinorganiccrystallinematerialsonthestrengthandporestructuresofcementbasedcomposites AT huimihsu effectsofrecycledfineaggregatesandinorganiccrystallinematerialsonthestrengthandporestructuresofcementbasedcomposites |
_version_ |
1721413664950452224 |