基于注浆模拟的道路基层碱激发材料加固效果研究
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摘要
为更好地将碱激发材料应用于道路基层注浆加固工程中,开发了室内注浆模拟小型足尺试验装置,测试评价了不同级配水稳碎石基层及不同脱空工况下的碱激发材料注浆加固效果,预测了碱激发注浆材料及其注浆后形成结石体的7 d抗压强度相关关系。结果表明:碱激发注浆材料对于处治水稳碎石基层脱空病害具有良好的适应性,对于间断级配型基层的处治效果更优,其处治后结石体7 d抗压强度可达10. 91～12. 54 MPa,满足重载交通下水稳碎石基层的强度要求;在处治不同脱空程度的基层病害时,整体芯样的抗压强度随着注浆高度的增加而增大,碱激发注浆材料形成结石体早期强度形成速度较快,有利于快速开放交通;注浆后的混合料结石体与注浆材料的7 d抗压强度呈现出较强的相关性。
In order to better apply alkali-activated materials in the road base grouting reinforcement engineering,a small full-scale experimental device for grouting simulation was developed,the grouting reinforcement effect of alkali-activated material under cement stabilized macadam base with different gradation and different void conditions were evaluated,the 7 d compressive strength correlation between the alkali-activated grouting material and the mixture stone formed after grouting was predicted. The results show that the alkali-activated grouting material has good adaptability to the void reinforcement of cement stabilized macadam base. It has better treatment effect for the gap graded base,and the 7 d compressive strength can reach 10. 91-12. 54 MPa after the reinforcement,this can meet the strength requirements of cement stabilized macadam base under heavy traffic. When reinforce the road base with different degrees of void diseases,the strength of the overall core sample increases with the increase of the grouting height,and the early strength formation rate of the alkali-activated grouting material is faster,which is conducive to early traffic opening. There is a strong correlation for 7 d compressive strength of the mixture stone after grouting and the alkali-activated grouting material.
In order to better apply alkali-activated materials in the road base grouting reinforcement engineering,a small full-scale experimental device for grouting simulation was developed,the grouting reinforcement effect of alkali-activated material under cement stabilized macadam base with different gradation and different void conditions were evaluated,the 7 d compressive strength correlation between the alkali-activated grouting material and the mixture stone formed after grouting was predicted. The results show that the alkali-activated grouting material has good adaptability to the void reinforcement of cement stabilized macadam base. It has better treatment effect for the gap graded base,and the 7 d compressive strength can reach 10. 91-12. 54 MPa after the reinforcement,this can meet the strength requirements of cement stabilized macadam base under heavy traffic. When reinforce the road base with different degrees of void diseases,the strength of the overall core sample increases with the increase of the grouting height,and the early strength formation rate of the alkali-activated grouting material is faster,which is conducive to early traffic opening. There is a strong correlation for 7 d compressive strength of the mixture stone after grouting and the alkali-activated grouting material.
引文
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[11]叶家元,张文生,史迪.钙对碱激发胶凝材料的促凝增强作用[J].硅酸盐学报,2017,45(8):1101-1112.
[12]史迪,张文生,叶家元,等.养护条件对硅钙渣基碱激发胶凝材料性能、反应产物及微观结构的影响[J].硅酸盐学报,2017,45(8):1080-1087.
[13]王东平,陈佩圆,王亮,等.粉煤灰掺量对碱激发矿渣砂浆减缩特性研究[J].硅酸盐通报,2018,37(2):701-705.
[14] Moraes J C B D,Tashima M M,Melges J L P,et al. Optimum use of sugar cane straw ash in Alkali-activated binders based on blast furnace slag[J]. Journal of Materials in Civil Engineering,2018,30(6):04018084.
[15] Wang C H,Wen P H,Wang M H,et al. Preparation and characterization of road alkali-activated blast furnace slag paste[J]. Construction&Building Materials,2018,181:175-184.
[2]王安辉,丁选明,余沛,等.侧向辐射注浆技术及其在运营高速公路中的应用效果[J].公路,2016,61(3):22-27.
[3]张磊,问鹏辉,王朝辉,等.道路非开挖注浆加固补强材料研究进展[J].材料导报,2017,31(21):98-105.
[4]孔德玉,张俊芝,倪彤元,等.碱激发胶凝材料及混凝土研究进展[J].硅酸盐学报,2009,37(1):151-159.
[5]董晶亮,张婷婷,王立久.碱激发改性矿粉/砒砂岩复合材料[J].复合材料学报,2016,33(1):132-141.
[6]张耀君,杨梦阳,康乐,等.一类新型碱激发胶凝材料催化剂的研究进展[J].无机材料学报,2016,31(3):225-233.
[7] Wang W C,Wang H Y,Lo M H. The engineering properties of alkali-activated slag pastes exposed to high temperatures[J]. Construction&Building Materials,2014,68(15):409-415.
[8]孙小巍,吴陶俊.碱激发矿渣胶凝材料的试验研究[J].硅酸盐通报,2014,33(11):3036-3040.
[9]王健,张乐文,冯啸,等.碱激发地聚合物双液注浆材料试验与应用研究[J].岩石力学与工程学报,2015,34(S2):4418-4425.
[10]徐建军,吴开胜,赵大军.用于道路修复加固的地聚合物注浆材料的研制[J].新型建筑材料,2016,43(3):26-28.
[11]叶家元,张文生,史迪.钙对碱激发胶凝材料的促凝增强作用[J].硅酸盐学报,2017,45(8):1101-1112.
[12]史迪,张文生,叶家元,等.养护条件对硅钙渣基碱激发胶凝材料性能、反应产物及微观结构的影响[J].硅酸盐学报,2017,45(8):1080-1087.
[13]王东平,陈佩圆,王亮,等.粉煤灰掺量对碱激发矿渣砂浆减缩特性研究[J].硅酸盐通报,2018,37(2):701-705.
[14] Moraes J C B D,Tashima M M,Melges J L P,et al. Optimum use of sugar cane straw ash in Alkali-activated binders based on blast furnace slag[J]. Journal of Materials in Civil Engineering,2018,30(6):04018084.
[15] Wang C H,Wen P H,Wang M H,et al. Preparation and characterization of road alkali-activated blast furnace slag paste[J]. Construction&Building Materials,2018,181:175-184.