Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Subbase structure for preventing road base from cracking
The invention relates to a subbase structure for preventing a road base from cracking. The structure is characterized in that according to the subbase layer, waste rubber powder modified cement stabilized macadam is used for replacing traditional graded macadam or semi-rigid cement stabilized macadam to serve as the subbase layer. The subbase layer is prepared from the following mineral materials(by weight): 15-25 percent of 10-30 mm crushed stone, 20-27 percent of 10-20 mm crushed stone, 15-25 percent of 5-10 mm crushed stone, 17-21 percent of stone nitrate and 2-12 percent of waste rubber powder, wherein cement is added according to the dosage of 3%-7% of the total weight of the mineral aggregate; the type of the cement is ordinary Portland cement with strength grade being 42.5; the particle size of the waste rubber powder is 40-60 meshes; the thickness of the subbase layer is 15-25cm; and the design strength of the subbase layer is 3.0-5.0 MPa. The waste rubber powder modified cement stabilized macadam is used as the subbase layer, so that the constraint effect on the upper and lower base layers is reduced, the tensile stress and tensile strain of the bottoms of the upper and lower base layers are reduced, and the cracking of the road base layer is effectively prevented.
本发明涉及一种防道路基层开裂的底基层结构，其特征在于：所述底基层是使用废弃橡胶粉改性水泥稳定碎石代替传统的级配碎石或半刚性的水泥稳定碎石作为底基层，底基层按重量计矿料配合比为：10‑30mm碎石、10‑20mm碎石、5‑10mm碎石、石硝、废弃橡胶粉的组成比例为15%‑25%、20%‑27%、15%‑25%、17%‑21%、2%‑12%；按矿料总重量的3%‑7%的剂量添加水泥，水泥类型和强度等级是42.5的普通硅酸盐水泥；废弃橡胶粉粒径为40‑60目，底基层厚度为15‑25cm，底基层设计强度3.0‑5.0MPa。本发明使用废弃橡胶粉改性水泥稳定碎石作为底基层，减少了对上部下基层的约束作用，降低了上部下基层底部拉应力和拉应变，有效防止了道路基层开裂。
Subbase structure for preventing road base from cracking
The invention relates to a subbase structure for preventing a road base from cracking. The structure is characterized in that according to the subbase layer, waste rubber powder modified cement stabilized macadam is used for replacing traditional graded macadam or semi-rigid cement stabilized macadam to serve as the subbase layer. The subbase layer is prepared from the following mineral materials(by weight): 15-25 percent of 10-30 mm crushed stone, 20-27 percent of 10-20 mm crushed stone, 15-25 percent of 5-10 mm crushed stone, 17-21 percent of stone nitrate and 2-12 percent of waste rubber powder, wherein cement is added according to the dosage of 3%-7% of the total weight of the mineral aggregate; the type of the cement is ordinary Portland cement with strength grade being 42.5; the particle size of the waste rubber powder is 40-60 meshes; the thickness of the subbase layer is 15-25cm; and the design strength of the subbase layer is 3.0-5.0 MPa. The waste rubber powder modified cement stabilized macadam is used as the subbase layer, so that the constraint effect on the upper and lower base layers is reduced, the tensile stress and tensile strain of the bottoms of the upper and lower base layers are reduced, and the cracking of the road base layer is effectively prevented.
本发明涉及一种防道路基层开裂的底基层结构，其特征在于：所述底基层是使用废弃橡胶粉改性水泥稳定碎石代替传统的级配碎石或半刚性的水泥稳定碎石作为底基层，底基层按重量计矿料配合比为：10‑30mm碎石、10‑20mm碎石、5‑10mm碎石、石硝、废弃橡胶粉的组成比例为15%‑25%、20%‑27%、15%‑25%、17%‑21%、2%‑12%；按矿料总重量的3%‑7%的剂量添加水泥，水泥类型和强度等级是42.5的普通硅酸盐水泥；废弃橡胶粉粒径为40‑60目，底基层厚度为15‑25cm，底基层设计强度3.0‑5.0MPa。本发明使用废弃橡胶粉改性水泥稳定碎石作为底基层，减少了对上部下基层的约束作用，降低了上部下基层底部拉应力和拉应变，有效防止了道路基层开裂。
Subbase structure for preventing road base from cracking
一种防道路基层开裂的底基层结构
WANG KELIANG (Autor:in) / LIU GANG (Autor:in) / FAN SHENGWEI (Autor:in) / LIU LING (Autor:in) / SUI TONGBO (Autor:in) / LI SHUYUAN (Autor:in) / HU XIUYING (Autor:in) / XU JING (Autor:in) / WANG TAO (Autor:in) / TAN XUXIANG (Autor:in)
12.05.2020
Patent
Elektronische Ressource
Chinesisch
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