Abstract
Silane coupling agent (SCA), a kind of organic solvent, was introduced to improve the performance of coral coarse aggregates and enhance the interfacial adhesion between the inorganic coral aggregate and the cement paste of coral concrete. The crushing indicator and water absorption of the coral aggregates over various dipping times were measured, and the slump, interface microhardness, and compressive strength of coral concrete tested. The microscopic appearances of the coral concrete before and after modification were analyzed based on SEM images. The experimental results indicate that SCA can effectively reduce the crushing indicator and water absorption of coral coarse aggregates, and the modification performance becomes better over time. SCA facilitates the generation of chemical forces between the coral aggregates and cement mortars, improves adhesion between the aggregates and mortars, augments the microhardness of the interface, and increases the compressive strength. According to the microscopic appearance of the treated and untreated coral aggregate interfaces, the aggregates and the mortars are in closer combination after modification.
Highlights
Compared thecoral coral aggregates without the indicator themodified modified ones being soaked in agent the without modification, the crushing indicator ofofthe ones being soaked in the agent formodification, 24 h was reduced by 15.63%, while the water absorption was decreased by for 24 wash reduced by 15.63%, whilewhile the water absorption wasthat decreased byhydro33.33%
The article deals with the research ideas of surface coating treatmetal materials and uses surface treatment agent (KH-560) to surface treatment of coral ment of metal materials and uses surface treatment agent (KH-560) to surface treatment aggregate inorganic materials to enhance the performance of coral aggregate
Of coral aggregate inorganic materials to enhance the performance of coral aggregate
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. SCAs build the “bridge” connecting organic and inorganic materials They are often applied to polymer concrete modification to improve the adhesion between organic adhesive and inorganic aggregate in polymer concrete, such as resin concrete and pitch concrete. Luo et al [25] applied a thin layer of a SCA between a new and an old mortar and noted that the coupling agent in an appropriate concentration had probably generated chemical forces between the interfaces; the microscopic structure between the interfaces and the mechanical performance of the mortars were improved dramatically. This paper probed into the effect of SCA on coral aggregates from the physical and chemical perspectives.
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