Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dry-mixed ground mortar prepared from recycled aggregate and preparation method thereof
The invention provides dry-mixed ground mortar prepared from recycled aggregate and a preparation method thereof, and the preparation method comprises the following steps: crushing, refining, cleaning and screening construction waste to obtain recycled fine aggregate; modifying the recycled fine aggregate with polyether polyol, sodium silicate and a coupling agent to obtain modified recycled fine aggregate; and then, weighing ordinary Portland cement, the modified recycled fine aggregate, II-grade fly ash, modified palygorskite, redispersible latex powder, starch ether, a water reducing agent and sodium gluconate in parts by weight, and uniformly mixing to prepare the dry-mixed ground mortar. By modifying the recycled fine aggregate, the 28d compressive strength of the obtained modified recycled fine aggregate dry-mixed ground mortar is improved by nearly 20%, the water retention rate is improved by about 17%, the setting time is improved by about 9%, the 2h consistency loss rate is reduced by about 32%, and the performance of the modified recycled fine aggregate dry-mixed ground mortar is equivalent to that of natural river sand dry-mixed ground mortar, and even better so that the resource utilization of the construction waste is realized.
本发明提供了一种利用再生骨料制备的干混地面砂浆及其制备方法，其中，制备方法包括以下步骤：将建筑垃圾进行破碎细化、清洗和筛选，得到再生细骨料；用聚醚多元醇、硅酸钠和偶联剂对再生细骨料进行改性，获得改性再生细骨料；接着，按重量份称取普通硅酸盐水泥、改性再生细骨料、Ⅱ级粉煤灰、改性坡缕石、可再分散乳胶粉、淀粉醚、减水剂和葡萄糖酸钠，混合均匀，制得干混地面砂浆。通过对再生细骨料进行改性，获得的改性再生细骨料干混地面砂浆的28d抗压强度提高了近20％，保水率提高了约17％，凝结时间提高了约9％，2h稠度损失率降低了约32％，并且改性再生细骨料干混地面砂浆与天然河砂干混地面砂浆的性能相当，甚至略优，实现了建筑垃圾资源化利用。
Dry-mixed ground mortar prepared from recycled aggregate and preparation method thereof
The invention provides dry-mixed ground mortar prepared from recycled aggregate and a preparation method thereof, and the preparation method comprises the following steps: crushing, refining, cleaning and screening construction waste to obtain recycled fine aggregate; modifying the recycled fine aggregate with polyether polyol, sodium silicate and a coupling agent to obtain modified recycled fine aggregate; and then, weighing ordinary Portland cement, the modified recycled fine aggregate, II-grade fly ash, modified palygorskite, redispersible latex powder, starch ether, a water reducing agent and sodium gluconate in parts by weight, and uniformly mixing to prepare the dry-mixed ground mortar. By modifying the recycled fine aggregate, the 28d compressive strength of the obtained modified recycled fine aggregate dry-mixed ground mortar is improved by nearly 20%, the water retention rate is improved by about 17%, the setting time is improved by about 9%, the 2h consistency loss rate is reduced by about 32%, and the performance of the modified recycled fine aggregate dry-mixed ground mortar is equivalent to that of natural river sand dry-mixed ground mortar, and even better so that the resource utilization of the construction waste is realized.
本发明提供了一种利用再生骨料制备的干混地面砂浆及其制备方法，其中，制备方法包括以下步骤：将建筑垃圾进行破碎细化、清洗和筛选，得到再生细骨料；用聚醚多元醇、硅酸钠和偶联剂对再生细骨料进行改性，获得改性再生细骨料；接着，按重量份称取普通硅酸盐水泥、改性再生细骨料、Ⅱ级粉煤灰、改性坡缕石、可再分散乳胶粉、淀粉醚、减水剂和葡萄糖酸钠，混合均匀，制得干混地面砂浆。通过对再生细骨料进行改性，获得的改性再生细骨料干混地面砂浆的28d抗压强度提高了近20％，保水率提高了约17％，凝结时间提高了约9％，2h稠度损失率降低了约32％，并且改性再生细骨料干混地面砂浆与天然河砂干混地面砂浆的性能相当，甚至略优，实现了建筑垃圾资源化利用。
Dry-mixed ground mortar prepared from recycled aggregate and preparation method thereof
一种利用再生骨料制备的干混地面砂浆及其制备方法
LAI GUANGXING (Autor:in) / YIN JIANLI (Autor:in) / YE JUNHUI (Autor:in) / XIAO WEI (Autor:in) / CHEN YUJIA (Autor:in) / GUO YUANQIANG (Autor:in) / LIN TIANXING (Autor:in)
06.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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