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Abstract

In order to investigate whether water-based polymer solution road soilfix (SRX) graded gravel can be used in the base, this paper studied the optimal SRX dosage, mechanical properties, water stability, temperature shrinkage performance, and high temperature stability of water-based polymer SRX graded gravel through laboratory molding test. The results show that the optimal SRX dosage of water-based polymer SRX graded gravel should be 0.5%. For every 0.25% increase in SRX dosage, RCBR (California bearing ratio) and compressive strength increase by at least 6.6% and 9.8%, respectively. Water-based polymer SRX graded gravel belongs to flexible base material. The elasticity modulus and dynamic stability increase with the increase in SRX dosage. It is suggested that the dynamic modulus value of 0.5%SRX should be 600–650 MPa when the SRX polymer base is designed and calculated for pavement structure. In the range of −20–20 °C, the temperature shrinkage coefficient decreases first and then increases with the increase in temperature. The temperature shrinkage coefficient reaches the minimum in the range of −10–0 °C. With the increase in freeze-thaw cycles and soaking time, the maximum reduction of RCBR is not more than 4.8%. The results show that the water-based polymer SRX graded gravel has higher resilience modulus, mechanical strength, and dynamic stability, as well as better water stability and smaller temperature shrinkage coefficient, which indicates that the water-based polymer SRX graded gravel can be popularized and used in grassroots.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.040

First Page

236

Last Page

241

Submission Date

March 2025

Reference

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