The influence of mineral substrate composition and structure on bacterial calcium carbonate productivity and polymorph selection was studied. Bacterial calcium carbonate precipitation occurred on calcitic (Iceland spar single crystals, marble, and porous limestone) and silicate (glass coverslips, porous sintered glass, and quartz sandstone) substrates following culturing in liquid medium (M-3P)...

The objective of this research is to study the effects produced by ternary binders which combine addition waste brick powder with fly ash, limestone, ground granulated blast furnace slag or glass in microstructure and mechanical properties mortars. In these binders, ordinary Portland cement was partially replaced 10% another abovementioned additions. Mortars prepared without additions were also...

Originally described from limited exposures in central Noble County, Ohio, the Noble Limestone Member (Congemaugh Group, Pennsylvanian) has recently been discovered at three additional localities in northern Noble County and eastern Guernsey County. The Noble Limestone Member overlies the fresh-water Ewing Limestone Member and occurs beneath the Rock Riffle Run Limestone Member, at a position a...

This article reports the potential use of waste glass powder (GP) to improve the performance of concrete subjected to freeze-thaw (FT) cycling. Three GP contents were utilized in the study: 6%, 12%, and 18% by weight of cement. The other experimental parameters that were investigated in the study include: water to cement ratio (0.4 and 0.6) and aggregate type (limestone and tuff). Concrete pris...

• Effect of limestone on engineering properties alkali-activated concrete (AAC) was estimated. Sustainability AAC with different precursors assessed. Limestone addition can lead to a more intensive and accelerated reaction process AAC. powder refine densify the pore structure due filler effect. is beneficial mechanical shrinkage resistance Alkali-activated promising sustainable alternative ceme...

The pulverized lime/limestone injection by top oxygen blowing lance during the basic furnace (BOF) process has gained much interest in recent years due to its advantages helping slag formation and consequently promoting refining reactions such as dephosphorization. In this pneumatic process, understanding motion behavior distribution of powder particles is importance for regulating designing sy...

Iodine is an essential micronutrient for human health. Its deficiency causes a number of functional and developmental abnormalities such as goitre. The limestone region of Derbyshire, UK was goitre-endemic until it declined from the 1930s and the reason for this has escaped a conclusive explanation. The present study investigates the cause(s) of goitre in the UK-Peak District area through an as...