|Table of Contents|

Strength characteristics of cement stabilized large-sized steel slag base with different forming methods(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2023年6期
Page:
13-24
Research Field:
道路工程
Publishing date:

Info

Title:
Strength characteristics of cement stabilized large-sized steel slag base with different forming methods
Author(s):
LI Xiao-bin1; 2;  YI Jiang-tao1;  CUI Can-yang3;  ZHANG Lei2;  XUE Hai-fang2;  SHENG Yan-ping4
(1. School of Civil Engineering, Chongqing University, Chongqing 400044, China; 2. Qinghai Traffic Construction Management Co. Ltd., Xining 810000, Qinghai, China; 3. School of Civil Engineering,Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 4. School of Material Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China)
Keywords:
road engineering;  cement stabilized large-sized steel slag base;  experimental research;  forming method;  strength characteristic
PACS:
U414
DOI:
10.19721/j.cnki.1671-8879.2023.06.002
Abstract:
In order to study the applicability of large-sized steel slag in road base, the design method forgradation of large-sized asphalt mixture was adopted to mix different proportions of steel slag andmacadam. The law of the OMC and the MDD of cement stabilized large-sized steel slag base mixtures(CSLS)under different cement contents and forming methods were analyzed. And then, unconfinedcompressive strength(UCS), indirect tensile strength(ITS), compressive resilience modulus(CRM)tests ofCSLS with different forming methods and structure types were conducted. The potential laws of itsmechanical properties, curing time, cement contents, forming methods and structure types were studied.The results show that the average maximum dry density of CSLS with skeleton-dense structure andsuspended-dense structure is 1.023 times and 1.013 times of that with quasi-static-compaction, respectively.The average optimum moisture content of the mixture under quasi-static-compaction is 1.111 times and1.223 times of that under the vibration compaction method. The curing time has a positive impact onthe strength characteristics of CSLS, showing a nonlinear growth trend. The cement content increasedfrom 4.0% to 6.0%, and the 7 d UCS of CSLS increased by 25.9% on average. The 28 d ITS increased by39.6% on average, and the 90 d CRM increased by 22.4%. The forming methods have a great influenceon the road performance of CSLS. For the suspended-dense structure of CSLS, the 7 d UCS, 28 d ITS and90 d CRM of the vibration forming specimens are 109.9%, 122.8% and 54.2% higher than those of thequasi-static-compaction specimens, respectively. For the skeleton-dense structure of CSLS, the 7 d UCS,28 d ITS and 90 d CRM of the vibration forming specimens are 108.5%, 117.4% and 52.9% higher thanthose of the quasi-static-compaction specimens, respectively. The mechanical properties of thesuspended-dense structure are slightly higher than that of the skeleton-dense structure under the twoforming methods. Under vibration forming, the 7 d UCS, 28 d ITS and 90 d CRM of the suspended-densestructure are 14.8%, 10.6% and 8.6% higher than those of the skeleton-dense structure, respectively.5 tabs, 14 figs, 26 refs.

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Last Update: 2023-10-30