Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dry-mixed plastering mortar prepared from recycled aggregate and preparation method thereof
The invention provides dry-mixed plastering mortar prepared from recycled aggregate and a preparation method thereof. The preparation method comprises the following steps: repeatedly crushing, refining, cleaning and screening construction waste, and obtaining 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 and a water-retaining agent in parts by weight, and uniformly mixing to prepare the dry-mixed plastering mortar. According to the technical scheme, by modifying the recycled fine aggregate, the water retention rate of the obtained modified recycled fine aggregate dry-mixed plastering mortar is increased by about 20%, the setting time is prolonged by about 4%, the thickness loss rate in 2h is reduced by about 30%, the 14d tensile bonding strength is improved by about 174%, the 28d shrinkage rate is reduced by about 49%, moreover, the modified recycled fine aggregate dry-mixed plastering mortar is equivalent to or even slightly superior to natural river sand dry-mixed plastering mortar in performance, resource utilization of construction waste is achieved, 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抹灰砂浆及其制备方法，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、粉煤灰和保水剂，混合均匀，制得干混抹灰砂浆。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抹灰砂浆的保水率提高了约20％，凝结时间提高了约4％，2h稠度损失率降低了约30％，14d拉伸粘结强度提高了约174％，28d收缩率降低了近49％，并且改性再生细骨料干混抹灰砂浆与天然河砂干混抹灰砂浆的性能相当，甚至略优，实现了建筑垃圾资源化利用，变废为宝。
Dry-mixed plastering mortar prepared from recycled aggregate and preparation method thereof
The invention provides dry-mixed plastering mortar prepared from recycled aggregate and a preparation method thereof. The preparation method comprises the following steps: repeatedly crushing, refining, cleaning and screening construction waste, and obtaining 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 and a water-retaining agent in parts by weight, and uniformly mixing to prepare the dry-mixed plastering mortar. According to the technical scheme, by modifying the recycled fine aggregate, the water retention rate of the obtained modified recycled fine aggregate dry-mixed plastering mortar is increased by about 20%, the setting time is prolonged by about 4%, the thickness loss rate in 2h is reduced by about 30%, the 14d tensile bonding strength is improved by about 174%, the 28d shrinkage rate is reduced by about 49%, moreover, the modified recycled fine aggregate dry-mixed plastering mortar is equivalent to or even slightly superior to natural river sand dry-mixed plastering mortar in performance, resource utilization of construction waste is achieved, 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抹灰砂浆及其制备方法，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、粉煤灰和保水剂，混合均匀，制得干混抹灰砂浆。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抹灰砂浆的保水率提高了约20％，凝结时间提高了约4％，2h稠度损失率降低了约30％，14d拉伸粘结强度提高了约174％，28d收缩率降低了近49％，并且改性再生细骨料干混抹灰砂浆与天然河砂干混抹灰砂浆的性能相当，甚至略优，实现了建筑垃圾资源化利用，变废为宝。
Dry-mixed plastering mortar prepared from recycled aggregate and preparation method thereof
一种利用再生骨料制备的干混抹灰砂浆及其制备方法
LAI GUANGXING (Autor:in) / YIN JIANLI (Autor:in) / CHEN YUJIA (Autor:in) / XIAO WEI (Autor:in) / YE JUNHUI (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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