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The invention relates to a pretreatment method of machine-made sand and concrete containing the machine-made sand, and the pretreatment method comprises the following steps: step 1, crushing and screening pretreatment: carrying out coarse crushing and fine crushing on limestone tailings to obtain medium sand with the average particle size of 25-30mm; washing the medium sand with clear water, and drying; step 2, modification treatment: step 2-1, preparation of a modifier: mixing water, a polyacrylic acid solution, mercaptopropionic acid, hydroxyethylidene diphosphonic acid, a dissociation agent and a penetrant, and uniformly stirring at 60-65 DEG C; step 2-2, adding a modifier into the medium sand, uniformly stirring at 50-55 DEG C, and carrying out heat preservation and standing at 30-35 DEG C for 6 hours; washing with deionized water and drying; performing ultrasonic vibration screening to obtain modified sand with the average particle size of 15-25mm; and 3, the modified sand is subjected to three-stage vibration screening, and machine-made sand with the average particle size being 0.15-5 mm is obtained. The method has the effect of reducing the clod content in the machine-made sand.
本申请涉及一种机制砂的预处理方法及含该机制砂的混凝土,预处理方法为:步骤1,破碎筛分预处理:将石灰石尾矿进行粗破碎和细破碎,得到平均粒径为25‑30mm的中砂;用清水对中砂冲洗、干燥;步骤2,改性处理:步骤2‑1,制备改性剂:将水、聚丙烯酸溶液、巯基丙酸、羟基乙叉二膦酸、解离剂和渗透剂混合,在60‑65℃下搅拌均匀;步骤2‑2,将改性剂加入中砂中,在50‑55℃下搅拌均匀,于30‑35℃下保温静置6h;用去离子水冲洗、干燥;超声波振动筛分,得到平均粒径为15‑25mm的改性砂;步骤3,将改性砂三级振动筛分,得到平均粒径为0.15‑5mm的机制砂。本申请具有降低机制砂中的泥块含量的效果。
The invention relates to a pretreatment method of machine-made sand and concrete containing the machine-made sand, and the pretreatment method comprises the following steps: step 1, crushing and screening pretreatment: carrying out coarse crushing and fine crushing on limestone tailings to obtain medium sand with the average particle size of 25-30mm; washing the medium sand with clear water, and drying; step 2, modification treatment: step 2-1, preparation of a modifier: mixing water, a polyacrylic acid solution, mercaptopropionic acid, hydroxyethylidene diphosphonic acid, a dissociation agent and a penetrant, and uniformly stirring at 60-65 DEG C; step 2-2, adding a modifier into the medium sand, uniformly stirring at 50-55 DEG C, and carrying out heat preservation and standing at 30-35 DEG C for 6 hours; washing with deionized water and drying; performing ultrasonic vibration screening to obtain modified sand with the average particle size of 15-25mm; and 3, the modified sand is subjected to three-stage vibration screening, and machine-made sand with the average particle size being 0.15-5 mm is obtained. The method has the effect of reducing the clod content in the machine-made sand.
本申请涉及一种机制砂的预处理方法及含该机制砂的混凝土,预处理方法为:步骤1,破碎筛分预处理:将石灰石尾矿进行粗破碎和细破碎,得到平均粒径为25‑30mm的中砂;用清水对中砂冲洗、干燥;步骤2,改性处理:步骤2‑1,制备改性剂:将水、聚丙烯酸溶液、巯基丙酸、羟基乙叉二膦酸、解离剂和渗透剂混合,在60‑65℃下搅拌均匀;步骤2‑2,将改性剂加入中砂中,在50‑55℃下搅拌均匀,于30‑35℃下保温静置6h;用去离子水冲洗、干燥;超声波振动筛分,得到平均粒径为15‑25mm的改性砂;步骤3,将改性砂三级振动筛分,得到平均粒径为0.15‑5mm的机制砂。本申请具有降低机制砂中的泥块含量的效果。
Pretreatment method of machine-made sand and concrete containing machine-made sand
一种机制砂的预处理方法及含该机制砂的混凝土
MOMO (author)
2022-05-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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