丰南跨津山特大桥乳化沥青砂浆配合比设计.pdf

桥梁建设2013年第43卷第1期(总第218期)
Bridge Construction, Vol 43, No 1, 2013(Totally No 218)
89
文章编号:1003-4722(2013)01~0089-05
丰南跨津山特大桥乳化沥青砂浆配合比设计
李芦林,李建东
(中铁大桥局集团第六工程有限公司,湖北武汉430100)
摘要:津秦客运专线丰南跨津山特大桥为双线铁路桥,该桥部分段轨道板和混凝土底座或
支承层之间的垫层采用水泥乳化沥青砂浆(CA砂浆)。设计CA砂浆配合比时,通过大量试验,初
步选定原材料,采用正交设计方法,分析4种原材料(乳化沥青、千料、消泡剂、减水剂)掺量对CA
砂浆性能的影响情况,确定CA砂浆初始配合比及搅拌エ艺。在对初始配合比砂桨进行揭板试验
的过程中出现气泡过多、过大、空洞、表面有白色带状条的问题,经调整,最终确定CA砂浆基本配
合比为千料:乳化沥青:减水剂:消泡剂:水=1500:275:5.0~5.5(可调):0.5~0.7(可
调):135~145(可调)。对该配合比CA砂浆进行审核及验证,审核结果表明所检测的各项指标均
满足相应要求。
关键词:铁路桥;水泥乳化沥青砂桨;配合比;正交设计;揭板试验
中图分类号:TU578.1
文献标志码:A
Mix Proportioning Design of Emulsified Asphalt Mortar for
Fengnan Bridge Spanning Tianjin-shanhaiguan Railway
Liiu-lin, LI Jian-dong
( The 6th Engineering Co, Ltd, China Railway Major Bridge Engineering Group, Wuhan 430]00, China)
Abstract: The Fengnan Bridge on Tianjing-qinhuangdao Passenger Dedicated Railway span
ning Tianjin-shanhaiguan Railway is a double-track railway bridge. On part of the section of the
bridge, the cement emulsified asphalt mortar(CA mortar) was used as the padding courses be
tween the track slabs and the concrete bases or bearing surfaces. Before the mix proportioning of
the mortar was designed, the materials for the mortar were firstly preliminarily chosen through a
great amount of tests and the mortar was then designed by the orthogonal design method. The in
fluences of 4 kinds of the materials(i. e. the emulsified asphalt, drier, defoaming agent and wa
ter-reducing agent) on the performance of the mortar were analyzed and the initial mix proportio
ning and the workmanship for mixing the mortar were determined. In the slab uncovering tests
for the mortar mixed according to the initial mix proportioning, it was found that the air bulbs
were two many and too big and the problems of the cavity and surface white strips existed. After
adjusted, the final mixing proportioning was determined to be as the follows: the drier emulsi
fied asphalt: water reducing agent: defoaming agent water=1 500: 275: 5.0-5.5(adjusta-
ble): 0.5-0.7(adjustable) 135-145(adjustable). The mortar was finally checked and veri
fied and the results of the checking showed that the various indices of the mortar could meet it
corresponding requirements
Key words: railway bridge; cement emulsified asphalt mortar; mixing proportioning; orthog-
onal design; slab uncovering test
收稿日期:2012-09-18
作者简介:李芦林,工程师,F-mail:342750086@qq.com。研究方向:工程施工检测