本文選題：半剛性路面 + 同步碎石　； 參考：《武漢理工大學(xué)學(xué)報(bào)》2014年02期

【摘要】：旨在考察設(shè)同步碎石下封層的基面間剪切強(qiáng)度的影響因素及影響規(guī)律,變化瀝青種類和用量、碎石粒徑和撒布率成型復(fù)合試件,采用直剪儀測(cè)試不同溫度及試驗(yàn)荷載下的剪切強(qiáng)度。研究結(jié)果表明:層間剪切強(qiáng)度隨瀝青用量呈先增加后減小的變化趨勢(shì),峰值處為最佳瀝青用量;在碎石粒徑與撒布率相同的情況下,不同種類瀝青的最佳瀝青用量及最大抗剪強(qiáng)度有差異,抗剪強(qiáng)度最大的為SBS改性瀝青,抗剪強(qiáng)度最小的為基質(zhì)瀝青;碎石撒布率對(duì)層間剪切強(qiáng)度有明顯的影響,5~10mm、10~15mm碎石的最佳撒布率為60%和30%;碎石粒徑對(duì)剪切強(qiáng)度和瀝青用量有重大影響,推薦5~10mm粒徑的碎石作為同步碎石下封層的最佳粒徑;隨著試驗(yàn)溫度升高,層間剪切強(qiáng)度降低;隨著試驗(yàn)試件上正壓力的加大,層間剪切強(qiáng)度增強(qiáng),試驗(yàn)結(jié)果偏離實(shí)際情況,因此推薦合理試驗(yàn)溫度為60℃、試驗(yàn)時(shí)試件上正壓力為0MPa。
[Abstract]:The purpose of this paper is to investigate the influencing factors and rules of the interfacial shear strength of the undersealing layer of synchronous macadam, and to change the type and amount of asphalt, the particle size of crushed stone and the distribution rate of the composite specimen. The shear strength under different temperature and test load was measured by direct shear apparatus. The results show that the interlaminar shear strength increases first and then decreases with the asphalt content, and the best asphalt content is at the peak value, and the gravel particle size is the same as the distribution rate. The best asphalt content and maximum shear strength of different kinds of asphalt are different. SBS modified asphalt has the highest shear strength and the base asphalt has the lowest shear strength. The distribution rate of crushed stone has obvious influence on the interlaminar shear strength, the optimum distribution rate of 1010mm / 1015mm macadam is 60% and 30% respectively, the diameter of crushed stone has great influence on the shear strength and the amount of asphalt, it is recommended that the crushed stone with 5~10mm particle size is the best particle size of the sealing layer of synchronous crushed stone. With the increase of the test temperature, the interlaminar shear strength decreases, and with the increase of positive pressure, the interlaminar shear strength increases, and the test results deviate from the actual situation. Therefore, the reasonable test temperature is 60 鈩，

本文編號(hào)：2071879