Comparison of the strength and durability performance of normal- and high-strength pozzolanic concretes at elevated temperatures

Impact of high temperature on PFA concrete

Waste foundry sand in concrete: A review

Properties of concrete using metallurgical industrial by-products as aggregates

Properties of concrete containing ground granulated blast furnace slag (GGBFS) at elevated temperatures

This research was initiated to evaluate the performance of foundry by-products in concrete and masonry products. Two series of experiments were conducted. The first series of experiments were directed toward the use of an air-cooled foundry slag in concrete as a partial replacement of coarse aggregate. The second series involved the use of foundry sand as a partial replacement of fine aggregate for making masonry blocks and paving stones. In the first series, foundry slag concrete was tested under laboratory conditions. A reference concrete without foundry slag was proportioned to obtain a 28-day compressive strength of 41 MPa. Two other mixes containing 50 and 100 percent foundry slag as a replacement of regular aggregate were also proportioned. The 100 percent slag mix showed compressive strength comparable to the reference mix. However, the modulus of elasticity of concrete containing 100 percent slag was higher than the reference concrete. Four mixes with and without foundry sands were proportioned for the manufacture of masonry blocks with a design strength of 10 MPa at the 28-day age. In addition, four mixes--three with and one without foundry sands--were also proportioned for the manufacture of paving stones with a design strength of 55 MPa at the 28-day age. In all of the mixes, 35 percent regular sand was replaced with new/used foundry sand obtained from different sources; no admixtures were added to the mixes. Test results indicated that masonry blocks made with 35 percent used foundry sand passed the American Society for Testing and Materials (ASTM) requirements for compressive strength, absorption, and bulk density. However, the paving mixes used in this study did not meet the target strength of 55 MPa and showed slightly higher absorption than the ASTM limit for paving stones.

Robert B. Wendorf

Papers

Application of foundry by-product materials in manufacture of concrete and masonry products