Estimation of impacts of cellulosic admixtures on sma features

Abstract

It is known that the supporting capacity of asphalt concrete depends on the weakest component of the system. Currently, there are two main ways to increase strength and shear resistance of asphalt concrete: modification of bitumen binder or regulation of granulometric composition, in the trend of increasing the rock stone content. However, in the first case, the structure-forming effect of multi-crushed stone asphalt concrete is not fully used, in the second - due to the high bitumen consumption necessary to fill intergranular bugholes, the mixture segregates. The elimination of this disadvantage was provided by the introduction of fine-fibred filler into mixture. Stone mastic asphalt concrete (SMA) was created, which fundamentally combines the advantages of impacted low-crushed stone concrete and maximum structural asphalt-concrete, which are widespread in some countries for roads with high traffic stream. In this paper, we studied the effect of various types of stabilizing additives on the performance of stone mastic asphalt concrete.

Quality improvement of monolithic steel fiber concrete floor slabs with void formers

“…The subject of the research is the construction technology and the quality control system of monolithic steel-fiber concrete floor slabs with void formers. At the first stage of this work, the reasons for the low quality of monolithic floors with void formers were studied by the method of visual and measuring control, and by comparing with known scientific and industrial data [24][25][26][27][28][29]. At the second stage, by the method of systematization the main defects and damages arising in the construction, repair and usage of these floor slabs were classified and ways to eliminate them were proposed.…”