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A platform for research: civil engineering, architecture and urbanism
Novel controllable low-strength material and preparation method thereof
The invention provides a novel controllable low-strength material and a preparation method thereof. The material is composed of recycled aggregate, excavation soil, cement, fly ash, a water reducing agent and water. The recycled aggregate is obtained by crushing, sieving and drying waste concrete blocks, and the particle size of the recycled aggregate is less than 4.75 mm; the excavation soil is a soil body obtained through site excavation, grinding, sieving and drying of a construction site, and the particle size of the excavation soil is smaller than 4.75 mm; the recycled aggregate and the excavation soil are used as fine aggregate; the cement and the fly ash are used as cementing materials. The method comprises the following steps of firstly, mixing the fine aggregate, the cementing material and the water reducing agent by a dry method, stirring for 3 minutes, then slowly adding the mixing water, continuously stirring for 3-5 minutes until slurry is uniformly mixed and reaches proper fluidity, pouring the slurry into a test mold, and then carrying out constant-temperature and constant-humidity maintenance indoors. The fluidity of the controllable low-strength material prepared by the method is 150-305 mm, the bleeding rate is less than 6%, the setting time is 16-22 h, and the strength value is 0.3-1.77 MPa.
本发明提供了一种新型可控性低强度材料及其制备方法。该材料由再生骨料、开挖土、水泥、粉煤灰、减水剂和水构成；所述再生骨料由废弃混凝土块经粉碎、过筛、烘干获得，粒径小于4.75mm；所述开挖土为建筑工地现场开挖、研磨过筛、烘干获得的土体，粒径小于4.75mm；所述再生骨料和开挖土作为细骨料；所述水泥和粉煤灰作为胶凝材料。首先干法混合细骨料、胶凝材料和减水剂并搅拌3分钟，之后缓慢加入拌合水并继续搅拌3～5分钟，直至浆液混合均匀并达到合适的流动度，将浆体倒入试模中，然后在室内进行恒温恒湿养护。由该方法制备的可控性地低强度材料流动度为150～305mm，泌水率小于6％，凝结时间为16～22h，强度值为0.3～1.77MPa。
Novel controllable low-strength material and preparation method thereof
The invention provides a novel controllable low-strength material and a preparation method thereof. The material is composed of recycled aggregate, excavation soil, cement, fly ash, a water reducing agent and water. The recycled aggregate is obtained by crushing, sieving and drying waste concrete blocks, and the particle size of the recycled aggregate is less than 4.75 mm; the excavation soil is a soil body obtained through site excavation, grinding, sieving and drying of a construction site, and the particle size of the excavation soil is smaller than 4.75 mm; the recycled aggregate and the excavation soil are used as fine aggregate; the cement and the fly ash are used as cementing materials. The method comprises the following steps of firstly, mixing the fine aggregate, the cementing material and the water reducing agent by a dry method, stirring for 3 minutes, then slowly adding the mixing water, continuously stirring for 3-5 minutes until slurry is uniformly mixed and reaches proper fluidity, pouring the slurry into a test mold, and then carrying out constant-temperature and constant-humidity maintenance indoors. The fluidity of the controllable low-strength material prepared by the method is 150-305 mm, the bleeding rate is less than 6%, the setting time is 16-22 h, and the strength value is 0.3-1.77 MPa.
本发明提供了一种新型可控性低强度材料及其制备方法。该材料由再生骨料、开挖土、水泥、粉煤灰、减水剂和水构成；所述再生骨料由废弃混凝土块经粉碎、过筛、烘干获得，粒径小于4.75mm；所述开挖土为建筑工地现场开挖、研磨过筛、烘干获得的土体，粒径小于4.75mm；所述再生骨料和开挖土作为细骨料；所述水泥和粉煤灰作为胶凝材料。首先干法混合细骨料、胶凝材料和减水剂并搅拌3分钟，之后缓慢加入拌合水并继续搅拌3～5分钟，直至浆液混合均匀并达到合适的流动度，将浆体倒入试模中，然后在室内进行恒温恒湿养护。由该方法制备的可控性地低强度材料流动度为150～305mm，泌水率小于6％，凝结时间为16～22h，强度值为0.3～1.77MPa。
Novel controllable low-strength material and preparation method thereof
一种新型可控性低强度材料及其制备方法
CHEN YONGGUI (author) / GUAN LEILEI (author) / TIAN TIAN (author) / ZHANG ZHEN (author)
2021-10-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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