A polyelectrolyte stabilizer cooperating with sodium silicate to stabilize surplus soils from engineering projects to establish dual-crosslinking flowable stabilized soil

Abstract

With the rapid development of modern society, the increasing construction of various large-scale infrastructure projects leads to the substantial generation of engineering surplus soils, greatly increasing the cost due to the pollution they cause in the surroundings. In this work, three kinds of anionic polyelectrolyte soil stabilizers [P(AA-co-AM), L-PAA, and H-PAA] were synthesized, which coordinated with sodium silicate (SS) to fabricate flowable stabilized soil (FSS), exhibiting an outstanding original fluidity of 202.33 mm, significantly exceeding the 180 mm threshold required for pumpable FSS. Meanwhile, the soil matrix stabilized by L-PAA and SS displayed the highest 28 day compressive strength of 6.25 MPa. This work presents a novel strategy for rapidly stabilizing engineering surplus soils, thereby significantly reducing the disposal cost, which is important in the field of construction engineering.