Increasing environmental pollution in urban areas has been endangering the survival of carbonate stones in monuments and statuary for many decades. Numerous conservation treatments have been applied for the protection and consolidation of these works of art. Most of them, however, either release dangerous gases during curing or show very little efficacy. Bacterially induced carbonate mineraliza...

A comparative in vitro research of the efficiency of nanosecond electropulse (Urolit-105M) and Holmium laser (Auriga) lithotripters is presented in this work. Four sizes of BegoStone cement stones of various densities were fabricated for these tests. A comparison of the efficiency of the lithotripters was performed in the experiments on pairs of probes corresponding to a predetermined stone siz...

The article presents measures to improve the quality of cementing production string high-performance wells. relevance proposed technological solutions is substantiated. results experimental studies installation simulating processes occurring during thickening cement slurry under action gravitational forces are presented. An algorithm for creating overpressure on wellhead fastening proposed. com...

The amount of ground olive stone available in Spain surpasses the needs construction industry for lightweight aggregate. objective herein is to generate a material, mortar, with different percentages stone, and then evaluate mechanical performance viability these materials manufacture elements used sector. To this end, an experiment was designed nine dosages three types cement. In all, 378 test...

To increase the resistance to fungal corrosion and improve performance of concrete cement stone, it is proposed introduce calcium stearate active metal nitrates in an amount 0.5% by weight into mixture at manufacturing stage. determine degree damage stone microorganisms Aspergillus niger, porosity, density, water absorption strength were determined. It has been found that introduction a hydroph...

Abstract The water-cement ratio is one of the key parameters grouting materials, which greatly affects working performance and mechanical properties materials. This paper studies physical properties, such as density, fluidity, consistency, bleeding rate, stone flexural compressive strength micro-cement materials with a 0.8:1, 1:1, 1.5:1 2.0:1 are investigated through variety indoor experiments....