A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dry-mixed masonry mortar prepared from recycled aggregate and preparation method thereof
The invention provides dry-mixed masonry mortar prepared from recycled aggregate and a preparation method thereof, and the preparation method comprises the following steps: repeatedly crushing, refining, cleaning and screening construction waste to obtain recycled fine aggregate; modifying the recycled fine aggregate by adopting polyether polyol, sodium silicate and a coupling agent to obtain modified recycled fine aggregate; and then, weighing Portland cement, the modified recycled fine aggregate, fly ash, redispersible latex powder and starch ether in parts by weight, and uniformly mixing to prepare the dry-mixed masonry mortar. According to the technical scheme, the recycled fine aggregate is modified, so that the 28d compressive strength of the obtained modified recycled fine aggregate dry-mixed masonry mortar is improved by nearly 33%, the water retention rate is improved by about 13%, the setting time is prolonged by about 6%, and the 2h consistency loss rate is reduced by about 27%; and the performance of the modified recycled fine aggregate dry-mixed masonry mortar is equivalent to or even slightly superior to that of natural river sand dry-mixed masonry mortar, so that resource utilization of the construction waste is realized, and waste is turned into wealth.
本发明提供了一种利用再生骨料制备的干混砌筑砂浆及其制备方法，其中，制备方法包括以下步骤：将建筑垃圾进行反复破碎细化、清洗和筛选，得到再生细骨料；采用聚醚多元醇、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，按重量份称取硅酸盐水泥、改性再生细骨料、粉煤灰、可再分散乳胶粉和淀粉醚，混合均匀，制得干混砌筑砂浆。上述技术方案通过对再生细骨料进行改性，获得的改性再生细骨料干混砌筑砂浆的28d抗压强度提高了近33％，保水率提高了约13％，凝结时间提高了约6％，2h稠度损失率降低了约27％，并且改性再生细骨料干混砌筑砂浆与天然河砂干混砌筑砂浆的性能相当，甚至略优，实现了建筑垃圾资源化利用，变废为宝。
Dry-mixed masonry mortar prepared from recycled aggregate and preparation method thereof
The invention provides dry-mixed masonry mortar prepared from recycled aggregate and a preparation method thereof, and the preparation method comprises the following steps: repeatedly crushing, refining, cleaning and screening construction waste to obtain recycled fine aggregate; modifying the recycled fine aggregate by adopting polyether polyol, sodium silicate and a coupling agent to obtain modified recycled fine aggregate; and then, weighing Portland cement, the modified recycled fine aggregate, fly ash, redispersible latex powder and starch ether in parts by weight, and uniformly mixing to prepare the dry-mixed masonry mortar. According to the technical scheme, the recycled fine aggregate is modified, so that the 28d compressive strength of the obtained modified recycled fine aggregate dry-mixed masonry mortar is improved by nearly 33%, the water retention rate is improved by about 13%, the setting time is prolonged by about 6%, and the 2h consistency loss rate is reduced by about 27%; and the performance of the modified recycled fine aggregate dry-mixed masonry mortar is equivalent to or even slightly superior to that of natural river sand dry-mixed masonry mortar, so that resource utilization of the construction waste is realized, and waste is turned into wealth.
本发明提供了一种利用再生骨料制备的干混砌筑砂浆及其制备方法，其中，制备方法包括以下步骤：将建筑垃圾进行反复破碎细化、清洗和筛选，得到再生细骨料；采用聚醚多元醇、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，按重量份称取硅酸盐水泥、改性再生细骨料、粉煤灰、可再分散乳胶粉和淀粉醚，混合均匀，制得干混砌筑砂浆。上述技术方案通过对再生细骨料进行改性，获得的改性再生细骨料干混砌筑砂浆的28d抗压强度提高了近33％，保水率提高了约13％，凝结时间提高了约6％，2h稠度损失率降低了约27％，并且改性再生细骨料干混砌筑砂浆与天然河砂干混砌筑砂浆的性能相当，甚至略优，实现了建筑垃圾资源化利用，变废为宝。
Dry-mixed masonry mortar prepared from recycled aggregate and preparation method thereof
一种利用再生骨料制备的干混砌筑砂浆及其制备方法
LAI GUANGXING (author) / YIN JIANLI (author) / XIAO WEI (author) / CHEN YUJIA (author) / YE JUNHUI (author) / GUO YUANQIANG (author) / LIN TIANXING (author)
2021-04-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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