【摘要】：多孔隙聚氨酯碎石混合料(簡(jiǎn)稱PPM)是由聚氨酯膠水與單級(jí)配或間斷級(jí)配骨料按一定配比拌和而成的新型路面材料,其空隙率通常介于15%~30%,具有良好的透水透氣性能。如今,國(guó)內(nèi)外對(duì)PPM尚缺乏系統(tǒng)研究,故目前還只是小規(guī)模應(yīng)用于大型廣場(chǎng)、公園道路、城市人行道等輕交通道面鋪裝。該文采用立方體無(wú)側(cè)限抗壓試驗(yàn)和矩形梁抗折試驗(yàn)對(duì)其強(qiáng)度特性及影響因素展開(kāi)了大量試驗(yàn)研究。結(jié)果表明:PPM的強(qiáng)度隨著膠水用量、插搗次數(shù)的增加而增大,隨著碎石粒徑、針片狀顆粒含量、空隙率的增大而減小;碎石形狀越接近于立方體其強(qiáng)度越大;當(dāng)膠水用量介于4%~6%之間、碎石形狀接近于立方體、針片狀含量低于5%、插搗次數(shù)為50次、養(yǎng)護(hù)齡期為24h、養(yǎng)護(hù)溫度為28℃時(shí),其抗壓強(qiáng)度可達(dá)到10MPa、抗折強(qiáng)度可達(dá)到4.5 MPa,由此可見(jiàn)PPM具有良好的路用前景。
[Abstract]:Polyporous polyurethane macadam mixture (PPM) is a new type of pavement material, which is composed of polyurethane glue and single grade aggregate or discontinuous gradation aggregate. Its porosity is usually between 15% and 30%, and it has good permeability and air permeability. At present, there is no systematic research on PPM at home and abroad, so it is only used for light traffic pavement such as large square, park road, city sidewalk and so on. In this paper, the strength characteristics and influencing factors of cube unconfined compression test and rectangular beam flexural test are studied. The results show that the strength of the mass fraction increases with the amount of glue and the number of insertions increases, and decreases with the increase of the particle size, the content of the needle and the void ratio, and the more the shape of the crushed stone is closer to the cube, the greater the strength is. When the amount of glue is between 4% and 6%, the shape of gravel is close to the cube, the content of needle sheet is less than 5, the number of insertions is 50, the curing age is 24 hours, and the curing temperature is 28 鈩，

本文編號(hào)：2185996