Experimental Investigation on a Novel Temperature-Controlled Phase Change Aggregate Concrete: Thermo-Mechanical Properties and Hydration Heat Control

To reduce the structural deterioration of mass concrete structures from temperature cracks, and lower energy consumption caused by traditional hydration heat cooling process, this paper reports preparation temperature-controlled phase change aggregate (PCA) a vacuum compaction method using light high-strength black ceramite No. 58 fully refined paraffin wax as material (PCM), encapsulation technology superfine cement epoxy resin. Further, through laboratory tests, cylinder compressive strength, thermal stability mixing breakage rate encapsulated PCA were tested, differences in mechanical properties such flexural strength splitting tensile between (PCAC) ordinary studied. A test was designed to storage effect PCA, control PCAC analyzed based on law conservation energy. The research conclusions are follows: (1) Both resin shells increase aggregate, with increasing it more than cement. stabilization is good after However, easily crushed that (2) Under condition water bath heating semi-insulation, when reaches 85 °C, difference common stone can be up 6 °C. Based conservation, results will converted same volume mixture;, 10 so significant. (3) 100% replacement compared reduced varying degrees, performance decline epoxy-encapsulated smaller cement; an actual project, possible improve grade make for defect.