海泡石/玻璃纤维增强陶粒混凝土的制备及其性能研究

Preparation and Properties of Sepiolite/Glass Fiber-Reinforced Ceramsite Concrete

摘要: 为解决常规砂石混凝土强度小、保温性能及吸声性能差的问题，采用煤矸石陶粒取代砂石，掺入粉煤灰、海泡石、玻璃纤维等掺料，设计制备了轻质高强陶粒混凝土，并进行抗折强度、抗压强度等力学性能测试，以及保温系数、吸声系数测试。试验结果表明：适量陶粒和混合掺料的加入有利于混凝土力学性能的提高，过量反而会降低强度。通过对特征样品进行导热系数测定，结果表明，陶粒和混合掺料的加入改善了混凝土的保温性能，导热系数减小。同样地，对特征样品进行吸声系数测试，结果表明陶粒和混合料的加入可以提高样品的吸声系数，且掺入海泡石的陶粒混凝土比掺入玻璃纤维的吸声系数大，吸声性能更好。

Abstract: To solve the problems of low strength, poor insulation and sound absorption performance of conventional sand and gravel concrete, coal gangue ceramsite was used instead of sand and gravel, and fly ash, sepiolite, glass fiber and other additives were added. Lightweight high-strength ceramsite concrete was designed and prepared, and mechanical properties such as flexural strength and compressive strength, as well as insulation coefficient and sound absorption coefficient were tested. The experimental results indicate that the addition of appropriate amounts of ceramsite and mixed admixtures is beneficial for improving the mechanical properties of concrete, while excessive amounts can actually reduce its strength. The results of measuring the thermal conductivity of characteristic samples showed that the addition of ceramsite and mixed admixtures improved the insulation performance of concrete and reduced thermal conductivity. Similarly, sound absorption coefficient tests were conducted on characteristic samples, and the results showed that the addition of ceramsite and mixtures can improve the sound absorption coefficient of the samples. Moreover, ceramsite concrete mixed with sepiolite has a higher sound absorption coefficient and better sound absorption performance than concrete mixed with glass fiber.