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本文探讨了 ESEC 混凝土工艺,认为水泥包裹层水灰比和厚度指标对 ESEC 混凝土强度影响较大。试验表明 ESEC 式艺与常规工艺相比混凝土强度显著提高,强度增长率达17%;包裹层水灰比为0.21～0.31时增强效果最好,厚度指标控制在0.375～0.43时最佳。混凝土水灰比较大时,其强度增长率较高。采用 SEM、显微硬度仪、水银测孔仪等近代分析仪器,研究了 ESEC 混凝土强度增强机理,研究认为,ESEC 混凝土强度提高的主要原因在于:水泥浆所产生的硬壳作用使混凝土中陶粒得到增强、水泥浆包裹层的存在改善了陶粒与水泥石界面过渡层结构,加强了界面粘结,提高了陶粒混凝土结构的匀质性。
This article examines the ESEC concrete process and considers that the water-cement ratio and thickness of the cement coating have a significant effect on the ESEC concrete strength. The test shows that the strength of concrete is significantly improved and the strength growth rate is up to 17% compared with the conventional process. The water-cement ratio of the coating layer is 0.21 to 0.31, and the best enhancement effect is achieved. The thickness index is best controlled between 0.375 and 0.43. When the concrete water ash is relatively large, its strength growth rate is high. Using SEM, micro-hardness tester, mercury porosimeter and other modern analytical instruments, the strength enhancement mechanism of ESEC concrete was studied. It was considered that the main reason for the increase in strength of ESEC concrete is that the hard shell effect produced by the cement slurry makes the ceramic particles in the concrete. The enhanced cement slurry layer improves the interfacial transition between the ceramsite and the cement stone, strengthens the interface bonding, and improves the homogeneity of the ceramsite concrete structure.