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生活垃圾焚烧底渣有一定火山灰活性,有可能作为水泥混凝土掺和料使用.研究了底渣-硅酸盐水泥体系的物化性能、强度和水化,及该体系对减水剂的吸附规律.结果显示,随底渣掺量增加,该体系标准稠度需水量和凝结时间有所增加,水泥水化变慢,胶砂强度降低,对减水剂的吸附量显著增加.研究显示,底渣可用作水泥混凝土掺和料,但需注意底渣的掺入有可能降低减水剂效率.
The municipal solid waste incineration bottom ash has certain pozzolanic activity and may be used as cement concrete admixture.The physical and chemical properties, strength and hydration of the bottom slag-Portland cement system are studied, and the adsorption law of the superplasticizer is studied. The results showed that with the increase of the bottom slag content, the standard consistency of water requirement and setting time increased, the hydration of cement decreased, the strength of mortar decreased, and the adsorption capacity of superplasticizer increased significantly. It should be used as cement admixture, but caution should be taken that the incorporation of bottom slag may reduce the efficiency of water reducer.