Concrete based on slag Portland cement for roads and airfields

The potential of obtaining and using concrete on the basis of slag Portland cement (SPC) for road and airfield pavements has been evaluated. Use of SPC in the concrete for such pavements is not allowed, because they do not provide the required standard strength and frost resistance. In order to activate SPC and accelerate its hardening, increase the strength and frost resistance of the produced concrete, it was proposed to prepare a concrete mix with a low water- cement ratio (W/C = 0.27), which was achieved with a new superplasticizing admixture based on polyaryl ethers. Strength, frost resistance and other parameters of the developed concrete were determined in accordance with the applicable standards. As a result, on the basis of SPC, quick-hardening high-strength frost-resistant waterproof normal-cured concrete with no air-entraining additives was obtained with the following characteristics: class B55, flexural strength class Btb6.5, wear resistance grade G1, water resistance W16, frost resistance F2 400, mix consistency P2 and retention of the latter 70 min. It was shown that, using special additives, it is possible to produce fast-hardening, effective and durable normal-cured concrete without air-entraining additives, conforming to the requirements for concrete for road and airfield pavements and having a high frost resistance.

Author: I.M. Ivanov, L.Y. Kramar, A.A. Kirsanova

Section: Concrete

Keywords: pavement, aerodrome pavement, rigid pavement, pavement concrete, cement concrete, ground granulated blast-furnace slag, Portland blastfurnace slag cement, freeze—thaw resistance of concrete, high performance concrete