Analysis of the Performance of Calcium Carbide Slag/Sulfonic Acid Diluent in Stabilizing Pavement Subgrade
In order to further improve the strength of granular base layer and reduce the high carbon e-mission generated during the production and use of traditional stabilizers,calcium carbide slag/sulfon-ic acid base polymer was chosen to study the change rule of the unconfined compressive strength and stress-strain analysis,by changing the sulfonic acid dilution ratio,calcium carbide slag/sulfonic acid ratio and maintenance conditions,so as to determine the optimal sulfonic acid dilution ratio as well as the sulfonic acid/calcium carbide slag ratio.The results showed that the highest unconfined compres-sive strength,with 3 d strength of 1 388.9 kPa and 7 d strength of 1 986.33 kPa,was achieved when the optimum dosage of geopolymer was 6%and when the dilution ratio of sulphonic acid was 300 mL/1 000 mL and the calcium carbide slag/sulfonic acid ratio was 6∶4.Compared with the untreated ag-gregates,after adding geopolymer,the unconfined compressive strength of the specimens for 7 d was increased by 104%,128%,and 176%,respectively,under the three different curing conditions.Therefore,the stabilization and curing of granular-type base layers using calcium carbide slag/sul-phonic acid had a significant synergistic enhancement effect,and the strength of the base layer was significantly increased.
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