Research on the Mechanical Properties of Composite Grouting Materials Based on Ordinary Portland–Sulphoaluminate Cement

This study aimed to enhance the mechanical properties of calcium sulfoaluminate cement grouting materials (HCSA) by investigating the effects of ordinary Portland cement (OPC) content, the ratio of quicklime to gypsum, and the dosage of sodium aluminate on the compressive strength of the OPC-CSA com...

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Bibliographic Details
Published in:Buildings (Basel) 2024-11, Vol.14 (11), p.3492
Main Authors: Wang, Zhenhua, Lan, Wei, Jia, Zhiwen, Lin, Manqing, Li, Dongwei
Format: Article
Language:English
Subjects:
Aluminum
Carbon dioxide
Cement
Cement grouting
Composite materials
Compressive strength
Dosage
Energy consumption
Geology
Gypsum
Hydration
Lime
Lime industry
Mechanical properties
orthogonal experiment
Portland cement
Portland cements
quicklime
Research methodology
Sodium
Sodium aluminate
Sulfoaluminate cement
sulphoaluminate cement
Water
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Summary:This study aimed to enhance the mechanical properties of calcium sulfoaluminate cement grouting materials (HCSA) by investigating the effects of ordinary Portland cement (OPC) content, the ratio of quicklime to gypsum, and the dosage of sodium aluminate on the compressive strength of the OPC-CSA composite system. The results indicate that as the OPC content increases, the compressive strength of the blended cement initially increases and then decreases, reaching a maximum at a 60% OPC replacement ratio within the experimental group. The addition of an appropriate amount of OPC to the CSA composite system effectively prevents the regression of compressive strength. With an increase in quicklime content, the compressive strength of the samples at various ages first increases and then decreases, with the optimal ratio of quicklime to gypsum found to be 2:8. Furthermore, sodium aluminate, used as an activator, when increased in dosage, leads to an initial increase followed by a decrease in the compressive strength of OPC-CSA samples, with an optimal incorporation rate of 0.75%, significantly enhancing the strength of the blended cement. In the orthogonal experiments, the dosage of sodium aluminate was identified as the most influential factor affecting the compressive strength of the composite grouting materials.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14113492