A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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
| European Patent Office | 2021
Machine-made sand, preparation method and concrete prepared from machine-made sand
| European Patent Office | 2022
Machine-made sand concrete using synergist and preparation method of machine-made sand concrete
| European Patent Office | 2020