A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modified recycled fine aggregate as well as preparation method and application thereof
The invention discloses modified recycled fine aggregate as well as a preparation method and application thereof, and belongs to the technical field of building materials. The preparation method of the modified recycled fine aggregate comprises the following steps: soaking the recycled fine aggregate in an acrylamide solution, then adding an initiator and a chain transfer agent into the solution, uniformly mixing, standing and airing to obtain the modified recycled fine aggregate. Aiming at the problems that the recycled fine aggregate is high in porosity and water absorption, the prepared mortar is poor in water-retaining property, high in mortar admixture mixing amount, large in shrinkage and easy to crack, the performance of the recycled fine aggregate is improved by using acrylamide solution soaking and free radical polymerization reaction, the water-retaining property of the recycled fine aggregate mortar is improved, and the mortar admixture mixing amount is reduced; the shrinkage of the mortar is reduced.
本发明公开一种改性再生细骨料及其制备方法和应用，属于建筑材料技术领域。改性再生细骨料的制备方法步骤如下：将再生细骨料浸泡于丙烯酰胺溶液中，然后向溶液中加入引发剂和链转移剂，混合均匀，静置后晾干，得到所述改性再生细骨料。针对再生细骨料孔隙率高、吸水率大，配制的砂浆保水性差、砂浆外加剂掺量高、收缩大易开裂的问题，本发明利用丙烯酰胺溶液浸泡和自由基聚合反应改善再生细骨料的性能，提高再生细骨料砂浆的保水性，降低砂浆外加剂的掺量，减少砂浆的收缩。
Modified recycled fine aggregate as well as preparation method and application thereof
The invention discloses modified recycled fine aggregate as well as a preparation method and application thereof, and belongs to the technical field of building materials. The preparation method of the modified recycled fine aggregate comprises the following steps: soaking the recycled fine aggregate in an acrylamide solution, then adding an initiator and a chain transfer agent into the solution, uniformly mixing, standing and airing to obtain the modified recycled fine aggregate. Aiming at the problems that the recycled fine aggregate is high in porosity and water absorption, the prepared mortar is poor in water-retaining property, high in mortar admixture mixing amount, large in shrinkage and easy to crack, the performance of the recycled fine aggregate is improved by using acrylamide solution soaking and free radical polymerization reaction, the water-retaining property of the recycled fine aggregate mortar is improved, and the mortar admixture mixing amount is reduced; the shrinkage of the mortar is reduced.
本发明公开一种改性再生细骨料及其制备方法和应用，属于建筑材料技术领域。改性再生细骨料的制备方法步骤如下：将再生细骨料浸泡于丙烯酰胺溶液中，然后向溶液中加入引发剂和链转移剂，混合均匀，静置后晾干，得到所述改性再生细骨料。针对再生细骨料孔隙率高、吸水率大，配制的砂浆保水性差、砂浆外加剂掺量高、收缩大易开裂的问题，本发明利用丙烯酰胺溶液浸泡和自由基聚合反应改善再生细骨料的性能，提高再生细骨料砂浆的保水性，降低砂浆外加剂的掺量，减少砂浆的收缩。
Modified recycled fine aggregate as well as preparation method and application thereof
一种改性再生细骨料及其制备方法和应用
CHEN JIAN (author) / ZHOU XIAOYANG (author) / HUANG BO (author)
2023-06-06
Patent
Electronic Resource
Chinese
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