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A platform for research: civil engineering, architecture and urbanism
Preparation method of modified recycled coarse aggregate
The invention discloses a preparation method of modified recycled coarse aggregate. The preparation method comprises the following steps of: soaking a recycled coarse aggregate obtained by crushing and screening waste concrete in clear water, cleaning and airing the recycled coarse aggregate; fully soaking the recycled coarse aggregate into a silicon slag emulsion, adding limestone powder into thesilicon slag emulsion, performing continuous stirring, and uniformly mixing the limestone powder with the silicon slag emulsion; and further performing slow stirring for a period of time, fishing outthe recycled coarse aggregate, and naturally draining the recycled coarse aggregate to obtain the modified recycled coarse aggregate. The silicon slag emulsion is a non-layered mixed solution obtained by ultrasonically dispersing acidic silicon slag particles with recovered zirconium in water uniformly. The silicon slag emulsion is utilized to modify the recycled coarse aggregate, and therefore,the moisture absorption of the recycled coarse aggregate can be reduced, and the water absorptivity of the recycled coarse aggregate can be lowered; meanwhile, when the modified recycled coarse aggregate is used for preparing recycled concrete, the early strength and the mechanical property of the concrete are improved. The method is simple in operation process and low in cost, and has very high economic value and application value.
本发明公开了一种改性再生粗骨料的制备方法。本发明所述制备方法为：将废弃混凝土破碎筛分后获得的再生粗骨料用清水浸泡并清洗干净，之后晾干；之后再生粗骨料充分浸泡在硅渣乳浊液中，并在其中加入石灰石粉，不断搅拌，与硅渣乳浊液混合均匀；之后继续缓慢搅拌一段时间，将再生粗骨料捞出自然沥干，即得到所述改性再生粗骨料；所述硅渣乳浊液为已回收锆的酸性硅渣颗粒在水中经超声分散均匀获得的不分层混合液。本发明利用硅渣乳浊液对再生粗骨料进行改性，减少再生粗骨料对水分的吸收，降低其吸水率；同时，利用改性后再生粗骨料配制再生混凝土时，提高混凝土早期强度和力学性能。本发明操作过程简单，成本低廉，具有很高的经济价值和应用价值。
Preparation method of modified recycled coarse aggregate
The invention discloses a preparation method of modified recycled coarse aggregate. The preparation method comprises the following steps of: soaking a recycled coarse aggregate obtained by crushing and screening waste concrete in clear water, cleaning and airing the recycled coarse aggregate; fully soaking the recycled coarse aggregate into a silicon slag emulsion, adding limestone powder into thesilicon slag emulsion, performing continuous stirring, and uniformly mixing the limestone powder with the silicon slag emulsion; and further performing slow stirring for a period of time, fishing outthe recycled coarse aggregate, and naturally draining the recycled coarse aggregate to obtain the modified recycled coarse aggregate. The silicon slag emulsion is a non-layered mixed solution obtained by ultrasonically dispersing acidic silicon slag particles with recovered zirconium in water uniformly. The silicon slag emulsion is utilized to modify the recycled coarse aggregate, and therefore,the moisture absorption of the recycled coarse aggregate can be reduced, and the water absorptivity of the recycled coarse aggregate can be lowered; meanwhile, when the modified recycled coarse aggregate is used for preparing recycled concrete, the early strength and the mechanical property of the concrete are improved. The method is simple in operation process and low in cost, and has very high economic value and application value.
本发明公开了一种改性再生粗骨料的制备方法。本发明所述制备方法为：将废弃混凝土破碎筛分后获得的再生粗骨料用清水浸泡并清洗干净，之后晾干；之后再生粗骨料充分浸泡在硅渣乳浊液中，并在其中加入石灰石粉，不断搅拌，与硅渣乳浊液混合均匀；之后继续缓慢搅拌一段时间，将再生粗骨料捞出自然沥干，即得到所述改性再生粗骨料；所述硅渣乳浊液为已回收锆的酸性硅渣颗粒在水中经超声分散均匀获得的不分层混合液。本发明利用硅渣乳浊液对再生粗骨料进行改性，减少再生粗骨料对水分的吸收，降低其吸水率；同时，利用改性后再生粗骨料配制再生混凝土时，提高混凝土早期强度和力学性能。本发明操作过程简单，成本低廉，具有很高的经济价值和应用价值。
Preparation method of modified recycled coarse aggregate
一种改性再生粗骨料的制备方法
WANG KE (author) / HUO CHENGJUN (author) / YU LINYU (author) / YAN JIAJIANG (author)
2021-02-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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