ROAD CONCRETE FROM WASTES OF INDUSTRY

The frost resistance and waterproofness of the concrete developed are 500 cycles and 8 to 12 W which is considerably higher than the requirements of the Building Code 2.03.01–84 for construction of roads (300 cycles and 6 W, respectively). The concrete does not require waterproof and frost resisting coatings. The fine-grained slag ash concrete developed consisted of the following materials: M 500 and 600 portland cement (520 – 640 kg/m³), slag sand (925 – 1085 kg/m³), hydra-removed ash (185 – 220 kg/m³), water (215–250 kg/m₃) and 136 – 157 M hydrophobic admixture (0.1 percent by weight of cement).

The concrete in this study developed has high frost resistance (up to 1300 cycles) and waterproofness (W = 10 – 12). For the first time phenomenon of transiting the alumosilicate particles of thermal power plant (TPP) slag concrete without amorphous state into crystalline one in the process of frosting and increasing the strength of concrete up to 10–15 % till 1000 cycles (awakening of slag on account of it) has been stated. The concrete developed was patented (“Slag – Ash – Concrete Mixture”, 1994). It is used at the Tom-Usinsky plant. Future is the construction of first – class roods in Russia and in other worthern countries.

• INTRODUCTION

• EXPERIMENTAL PROGRAM

• MIXTURE PROPORTIONING

• PHYSICO-MECHANICAL AND DEFORMATION PROPERTIES OF CONCRETE

• CONCLUSIONS

• REFERENCES