發(fā)布時(shí)間：2018-06-01 11:24

  本文選題：水泥微黏結(jié)碎石 + 骨架密實(shí)�。� 參考：《中外公路》2017年05期

【摘要】：為了減緩傳統(tǒng)半剛性基層收縮開裂和路面反射裂縫,采用逐級(jí)填充法和n法分別設(shè)計(jì)粗、細(xì)集料級(jí)配,利用無(wú)側(cè)限抗壓強(qiáng)度試驗(yàn)和干縮試驗(yàn)控制粗、細(xì)集料比例,形成兩種設(shè)計(jì)級(jí)配下的骨架密實(shí)型級(jí)配碎石材料。通過(guò)強(qiáng)度試驗(yàn),對(duì)比分析設(shè)計(jì)級(jí)配下與規(guī)范級(jí)配中值下水泥微黏結(jié)碎石的力學(xué)性能,最后進(jìn)行凍融循環(huán)試驗(yàn)、水穩(wěn)定性試驗(yàn)、干縮試驗(yàn),分析試件路用性能隨水泥劑量增加的變化規(guī)律。結(jié)果表明:推薦級(jí)配下的水泥微黏結(jié)碎石具有良好的路用性能,進(jìn)而驗(yàn)證了提出的設(shè)計(jì)級(jí)配的優(yōu)越性;并確定水泥微黏結(jié)級(jí)配碎石合理水泥劑量為3.0%。
[Abstract]:In order to slow down the shrinkage cracking and reflection crack of traditional semi-rigid base, coarse and fine aggregate gradation was designed by step filling method and n method, and the ratio of coarse and fine aggregate was controlled by unconfined compressive strength test and dry shrinkage test. Two kinds of skeleton dense grained macadam materials are formed under design gradation. Through strength test, the mechanical properties of cement micro-bonded macadam under design gradation and standard gradation were compared and analyzed. Finally, freeze-thaw cycle test, water stability test, dry shrinkage test were carried out. The variation of road performance with the increase of cement dose is analyzed. The results show that the cement microbonded macadam with recommended grading has good road performance, and the superiority of the proposed design gradation is verified, and the reasonable cement dosage is determined to be 3.0%.
【作者單位】： 長(zhǎng)安大學(xué)公路學(xué)院;中電建路橋集團(tuán)有限公司;商丘市公路管理局;
【基金】：陜西省自然科學(xué)基金資助項(xiàng)目(編號(hào):2011JM7001) 甘肅省交通運(yùn)輸廳科研項(xiàng)目(編號(hào):201227)
【分類號(hào)】：U414

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本文編號(hào)：1964013