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Abstract

The dredging process of harbor ponds will produce a large number of coral reef rocks. In order to reduce the impact of stone mining on the natural environment and improve the application of coral reef rock in the road base, this paper carried out the design of coral reef rock mixture grading according to Taylor n method, analyzed the impact of compaction process on the mixture grading through compaction test, and evaluated the degree of aggregate fragmentation with the breakage rate B5. The road performance of cement-stabilized coral reef rock mixture was studied by measuring the unconfined compressive strength, splitting strength, drying shrinkage, and temperature-induced shrinkage of the mixture. The results show that the compaction process will lead to aggregate particle breakage, and the degree of breakage is proportional to the coarse aggregate content of the mixture. The compressive strength and splitting strength of the mixture are directly proportional to the coarse particle content and cement content. In order to meet the strength requirements of the base material, the coarse particle content of the coral reef rock mixture should not be less than 50%, and the cement content should not be less than 4%. The shrinkage deformation of cement-stabilized coral reef rock mixture is obvious due to the high water loss rate in the early stage, and the shrinkage strain decreases with the increase in coarse aggregate content in the mixture. The temperature-induced shrinkage strain of the mixture is inversely proportional to the coarse aggregate content, and the temperature-induced shrinkage deformation of the mixture is larger when the temperature is 50–40 °C, so the influence of environmental temperature should be considered in the construction process.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.040

First Page

210

Last Page

214

Submission Date

May 2025

Reference

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