关键词: 渗蓄生态材料;废弃烧结砖;谷壳灰;海绵城市

Abstract: Based on the design concept of sponge city,a water storage and permeable material was prepared using waste sintered brick as aggregates and chaff ash as filler. The influences of aggregate size gradation,raw material mix proportion and filler content on water absorption, permeability and compressive strength of the material were studied. The optimum mix proportion with which the material can achieve good water storage,high water permeability and strength was obtained. The results show that when the aggregate of size ranges from 2. 36 mm to 4. 75 mm is used,the water absorption rate, permeability coefficient and compressive strength of the water storage and permeable material can reach 24. 3%,5 cm/s and 8 MPa respectively,and the water absorption rate can reach 30% by adding about 35 kg/m3 of chaff ash as filler. The water absorption rate is increased by 6%. The compressive strength and permeability coefficient of the water storage and permeable materials can reach 5 MPa or more and 4 cm/s or more respectively,which can be used in construction of the sponge city and the slope protection.

Key words: water storage and permeable material;waste sintered brick;chaff ash;sponge city