Provided in the present disclosure are a core flooring layer of a light-foamed SPC floor and a light-foamed SPC floor. Based on the total weight of the core flooring, the core flooring of the present disclosure contains 65.075.0 wt % of calcium carbonate, 18.025.0 wt % of polyvinyl chloride resin, 2.23.0 wt % of a foaming regulator, 2.53.3 wt % of a stabilizer, 0.100.20 wt % of a plasticizer, 0.100.15 wt % of an external lubricant, 0.10.40 wt % of an ADC foaming agent, and 0.51.0 wt % of an NC foaming agent. The present disclosure can greatly reduce the density of a SPC floor while improving the static bending strength, flexural elastic modulus and peeling strength, and reducing heating warpage.

A multi-part composition comprises a curable part and a curing part. The curable part comprises a curable epoxy resin and a first silicate component. The curing part comprises a curing agent and a second silicate component. The curable part or the curing part include a chemical blowing agent. The first silicate component and the second silicate component are different. The multi-part composition further comprises water. When mixed and cured, the multi-part composition forms an epoxy-geopolymer hybrid foam.