Impact tests were conducted using a specially made drop hammer impact device on concrete specimens (C60–C90) containing lean iron ore from mine waste as coarse aggregate to realize enhanced resistance in applications such pile driving. also equivalent conventional limestone for comparison. The statistical analysis results show that the number of impacts at initial and final cracking conformed W...

Alkali activated material has recently attracted great attention as an environmentally friendly building material. Generally, it exhibits higher mechanical properties and better durability when compared with Portland cement based materials. In this article, mixed alkali activated systems consisting of N-A-S-H and C-A-S-H hydrated gels were produced, using metakaolin as a dominated starting mate...

Studies on actinobacterial diversity in limestone habitats are scarce. This paper reports profiling of actinobacteria isolated from Hundung limestone samples in Manipur, India using ARDRA as the molecular tool for preliminary classification. A total of 137 actinobacteria were clustered into 31 phylotypic groups based on the ARDRA pattern generated and representative of each group was subjected ...

Abstract A concealed geological structure encountered during the excavation of a coal working face could connect to high-pressure water in limestone strata, which can result serious or catastrophic inrush accident. However, existing geophysical detection methods used ensure safety faces cannot detect small anomalies reliably. Based on generalized theory scattered waves, we have developed novel ...

The effects of a bio-treatment on limestone (here tuffeau) is measured over a large number of dryingimbibition cycles. A model based on a space-dependent permeability coefficient is proposed. It leads to a non-linear diffusion model which accounts for the deviation from the standard Washburn model. Keyword: Limestone, bio-mineralization, water transfer, imbibition, non-linear diffusion

This plant has a very large opportunity to be developed on ex-mining land, considering that this is an adaptive non-timber forest product grows and produces naturally without inoculation (injection) land: limestone, nickel, rocky sand, tin coal. added witharbuscular mycorrhizal fungi (AMF) liquid organic fertilizer such as Yomari Aquilaria malacensis Lamk. AMF able increase root growth, range, ...

The aim of this study was to analyze yields, biological efficiency, earliness (expressed as days to first harvest), and precociousness and establish models for the mushroom growing according to these parameters. The experiment followed a double factorial design with four sources of calcium (calcitic limestone, calcitic limestone + gypsum, dolomitic limestone and dolomitic limestone + gypsum) an...

Five Angus heifers (285 kg) with duodenal and ileal cannulas were used to study the effects of feeding mineral acid neutralizers on digesta and fecal pH, intestinal acid flow, DM, starch and CP digestion and amino acid absorption in cattle fed a high-concentrate diet (7.5 kg/d). The experimental design was a 5 x 5 latin square. Treatments included control diet alone or control diet with the add...