With high density, or few voids, strength is improved, and so is thermal conductivity, which is essential to prevent the wastes from stewing themselves to the melting point.
The effect of recycled aggregate on total void ratio, strength and permeability was examined.
While air voids within a certain range are beneficial for freezing-and-thawing resistance, large-size voids decreases strength and durability.
After fresh cemented paste backfill (CPB; a mix of tailings, binder and water) is poured into underground stopes (mined-out voids), its strength which is a key mechanical design criterion of CPB structures, gradually develops with time.
The effects of these by-products on the density, absorption, voids, compressive strength, thermal conductivity, thermal diffusivity, and specific heat of the concrete are all investigated.
The Vebe consistency, moisture density relations, water absorption, permeable voids, compressive strength, and F T resistances of comparable mixes were evaluated.
As the target void ratio increased, strength seems to have decreased due to a decrease in the amount of paste with respect to the amount of unit aggregates.
The sample quality of Toyoura sands obtained from 48 mm and 75 mm samplers are scrutinized based on void ratio, dynamic strength and deformation properties through model and cyclic undrained triaxial tests.
For a given density, although the additives in combination led to increased void numbers, higher strength was achieved due to reduced void size and connectivity, by preventing their merging and producing a narrow void size distribution.
The study is divided into two steps: (1) small-scale tests where the variation in vertical void distribution and strength properties is determined for 800 mm high blocks cast in different numbers of layers, and (2) full-scale implementation in a 26 m long Pearl-Chain Bridge.
