US 5,494,514 A · Weather resistant soil cement

Abstract

A weather resistant soil cement with an open pore structure for resisting freeze-thaw damage is formed of cement, fly ash, Free aggregates, water, and an aqueous foamed surfactant, and other application specific additives. The material is uniquely suited for using indigenous soils, mill tailings, or granular waste products as the aggregate component of the mixture, although commercially produced aggregates may be used depending on economics and availability. Due to its low density and flowable nature, it can be pumped or placed by gravity and without compaction. The resulting product is a low density material with construction and mining applications, that is suited for use as a fill or mad base. Specific product formulations are easily designed to permit removal at local sites with conventional excavating equipment.

Claims9

Dependent claims

A weather resistant cellular soil cement product, comprising a mixture- of:

(a) a base mix containing:
(1) cementitious component in the quantity range from 47 to pounds per cubic yard of base mix;
(2) aggregate in the size range from gravelly sand to minus 200 mesh particles;
(3) water in quantity sufficient to create a water-to-cementitious component ratio in the range from 0.25 to 20.0 and sufficient to wet the aggregate;
wherein the components of said base mix are proportioned to form a volume equal to one cubic yard;
and
(b) surfactant, formed into an aqueous foam having a density in the range from 1.56 to 2.5 pounds per cubic foot;
wherein said foam is unstabilized and defines pores within the product, such that upon setting of the product, the pores are interconnected.

5 more elements

Dependencies are inferred from the claim text.

Weather resistant soil cement

Life of this patent

Weather resistant soil cement

Life of this patent

Abstract

Claims9