摘要
分别考察了水灰比、砂灰比、粗钢渣代砂率、钢渣粉代水泥率和泥浆掺入率对灌浆材料的工作性能、导热性能和固结强度的影响。研究结果表明:在未加废钢渣(包括粗钢渣和钢渣粉)前提下,若水灰比为0.55～0.6、砂灰比为2～2.2时,灌浆材料的综合性能最好;若单独用粗钢渣替代砂,单独用微米级钢渣粉替代水泥,并且粗钢渣代砂率和钢渣粉代水泥率分别控制在40%和20%以内时,便能保证灌浆材料良好的综合性能;增大泥浆掺入率可提高灌浆材料的工作性能,但会降低其导热性能和固结强度,因此泥浆掺入率需控制在10%以内才能保证灌浆材料有足够的导热性能和固结强度。结果表明,工业废弃物的再利用,可为地源热泵工程节约24.84%的原材料成本。
The performance of cement-based grouts for ground source heat pump(GSHP) systems is examined and optimized.The effects of water/cement ratio,sand/cement ratio,replacement rate of natural river sand,replacement rate of cement and incorporation rate of slurry on workability,thermal conductivity and consolidation strength of cement-based grouts are investigated respectively.The results show that in absence of dumped steel slag containing coarse slag and slag powders,excellent comprehensive performance can be achieved under water/cement ratio ranging from 0.55 to 0.6 and sand/cement ratio from 2 to 2.2.The replacement rate of sand by coarse slag alone and replacement rate of cement by micron-scale slag powers alone are confined to 0% ~ 40% and 0% ~20%,respectively,in favor of the benign overall performance.In addition,increasing incorporation rate of slurry can enhance the workability but can decrease the thermal conductivity and the consolidation strength.Thus,the incorporation rate must not exceed 10% to ensure that the cement-based grouts have enough thermal conductivity and consolidation strength.The results also show that the raw material cost is supposed to be reduced by 24.84% with the recycle utilization of industrial waste.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2013年第4期134-138,共5页
Hydrogeology & Engineering Geology
基金
上海市科学技术委员会资助项目(10DZ2290600)
