Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System

Due to the advantages of high early strength and rapid setting, ternary systems consisting of ordinary Portland clinker (OPC), calcium sulphoaluminate (CSA) clinker, and anhydrite have broad application prospects. However, further studies need to be undertaken to find a more optimal mixing proportio...

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Autores principales:	Zhenzhen Yang, Hansong Ye, Qiang Yuan, Baiyun Li, Yuelin Li, Dajun Zhou
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	calcium sulphoaluminate Portland cement anhydrite ternary binder hydration chemical shrinkage Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/72f1eb8eac0b43d5876ff7f4005492e3
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spelling	oai:doaj.org-article:72f1eb8eac0b43d5876ff7f4005492e32021-11-25T18:15:35ZFactors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System10.3390/ma142270011996-1944https://doaj.org/article/72f1eb8eac0b43d5876ff7f4005492e32021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7001https://doaj.org/toc/1996-1944Due to the advantages of high early strength and rapid setting, ternary systems consisting of ordinary Portland clinker (OPC), calcium sulphoaluminate (CSA) clinker, and anhydrite have broad application prospects. However, further studies need to be undertaken to find a more optimal mixing proportion of this ternary binder in order to meet basic performance requirements. In this paper, isothermal calorimetric tests, chemical shrinkage tests, drying shrinkage tests, and compressive strength tests were carried out to systematically identify the effect of the OPC/CSA ratio and anhydrite dosage on the hydration, mechanical property development, and dimensional stability of ternary binders. It was found that a higher CSA content leads to a higher cumulative hydration heat, a shorter acceleration period, and a delayed induction period, which can be ascribed to the retardation of C<sub>3</sub>S at a high aluminate concentration. However, a higher addition of anhydrite can retard the main peak of hydration despite promoting the intermediate peak and improving the hydration reaction rate. The drying shrinkage of blends decreases first along with the CSA proportion and then increases. Moreover, a higher anhydrite content mitigates the drying shrinkage and hinders the strength development. Finally, considering the properties of both the fresh and hardened binder, the ternary blends with 5% anhydrite and OPC/CSA ratios ranging from 3/7 to 2/8 were identified as most suitable for applications that require a high early strength, stable late strength, and small level of shrinkage.Zhenzhen YangHansong YeQiang YuanBaiyun LiYuelin LiDajun ZhouMDPI AGarticlecalcium sulphoaluminatePortland cementanhydriteternary binderhydrationchemical shrinkageTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7001, p 7001 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	calcium sulphoaluminate Portland cement anhydrite ternary binder hydration chemical shrinkage Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	calcium sulphoaluminate Portland cement anhydrite ternary binder hydration chemical shrinkage Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Zhenzhen Yang Hansong Ye Qiang Yuan Baiyun Li Yuelin Li Dajun Zhou Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System
description	Due to the advantages of high early strength and rapid setting, ternary systems consisting of ordinary Portland clinker (OPC), calcium sulphoaluminate (CSA) clinker, and anhydrite have broad application prospects. However, further studies need to be undertaken to find a more optimal mixing proportion of this ternary binder in order to meet basic performance requirements. In this paper, isothermal calorimetric tests, chemical shrinkage tests, drying shrinkage tests, and compressive strength tests were carried out to systematically identify the effect of the OPC/CSA ratio and anhydrite dosage on the hydration, mechanical property development, and dimensional stability of ternary binders. It was found that a higher CSA content leads to a higher cumulative hydration heat, a shorter acceleration period, and a delayed induction period, which can be ascribed to the retardation of C<sub>3</sub>S at a high aluminate concentration. However, a higher addition of anhydrite can retard the main peak of hydration despite promoting the intermediate peak and improving the hydration reaction rate. The drying shrinkage of blends decreases first along with the CSA proportion and then increases. Moreover, a higher anhydrite content mitigates the drying shrinkage and hinders the strength development. Finally, considering the properties of both the fresh and hardened binder, the ternary blends with 5% anhydrite and OPC/CSA ratios ranging from 3/7 to 2/8 were identified as most suitable for applications that require a high early strength, stable late strength, and small level of shrinkage.
format	article
author	Zhenzhen Yang Hansong Ye Qiang Yuan Baiyun Li Yuelin Li Dajun Zhou
author_facet	Zhenzhen Yang Hansong Ye Qiang Yuan Baiyun Li Yuelin Li Dajun Zhou
author_sort	Zhenzhen Yang
title	Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System
title_short	Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System
title_full	Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System
title_fullStr	Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System
title_full_unstemmed	Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System
title_sort	factors influencing the hydration, dimensional stability, and strength development of the opc-csa-anhydrite ternary system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/72f1eb8eac0b43d5876ff7f4005492e3
work_keys_str_mv	AT zhenzhenyang factorsinfluencingthehydrationdimensionalstabilityandstrengthdevelopmentoftheopccsaanhydriteternarysystem AT hansongye factorsinfluencingthehydrationdimensionalstabilityandstrengthdevelopmentoftheopccsaanhydriteternarysystem AT qiangyuan factorsinfluencingthehydrationdimensionalstabilityandstrengthdevelopmentoftheopccsaanhydriteternarysystem AT baiyunli factorsinfluencingthehydrationdimensionalstabilityandstrengthdevelopmentoftheopccsaanhydriteternarysystem AT yuelinli factorsinfluencingthehydrationdimensionalstabilityandstrengthdevelopmentoftheopccsaanhydriteternarysystem AT dajunzhou factorsinfluencingthehydrationdimensionalstabilityandstrengthdevelopmentoftheopccsaanhydriteternarysystem
_version_	1718411443830784000

Factors Influencing the Hydration, Dimensional Stability, and Strength Development of the OPC-CSA-Anhydrite Ternary System

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