快凝无机植筋胶栓试验研究

对不同配合比下的无机胶凝材料试块的抗压强度和凝结时间进行了研究,得到了一组在强度和凝结速率方面均较好的配合比.在此配合比下,试块3d强度可到43.8MPa,达到28d抗压强度的69.0%,且凝结时间小于5min,具有良好的快凝高强性能.利用其快凝高强的性能,制作了2种不同类型的无机植筋玻璃胶栓,通过混凝土基材的植筋拉拔试验,探讨了不同钢筋直径、锚固深度、植筋角度以及植筋天数等因素下对极限拉拔承载力的影响.基于试验现象归纳了典型破坏形态,并根据极限拉拔承载力结果用数据回归方法提出了相对锚固长度计算公式.

Experimental Research on Rapid-solidification Inorganic Planting Bolt

Through the experimental research on the compressive strength and setting time of inorganic cementitious materials under different mix proportion, a good mix proportion with better strength and condensation rate was obtained. In this mix proportion, the strength of test block for three days was 43.7 MPa, reaching 69.0% of the compressive strength of 28 days, and the setting time was less than 5 min with good performance in rapid solidificatio and high strength. Two different types of inorganic glass plastic bolt were made on the rapid solidification and high strength performance, and the drawing ultimate bearing capacity under different bar diameter,anchorage depth, anchorage angle and time factors was investigated through the anchorage drawing experiment. Based on the experimental phenomena, typical failure modes were summarized and relative anchorage length formula with data regression was put forward on the basis of ultimate bearing capacity drawing results.