The alkali-silica reaction has been studied in depth due to the evolution knowledge of expansive phenomenon. One its most important aspects is rate aggregates. In Spain, at early 90s 20th century, aggregates were considered almost non-reactive. However, use accelerated curing and other environmental factors revealed that there potentially reactive siliceous Nevertheless, are several limestone w...

Concrete, which is frequently used in the production process of buildings; It made by mixing cement, water, aggregate and additives appropriate amounts. important that physical, chemical, mineralogical especially mechanical properties concrete are at desired level terms strength durability built structures. In this direction, selection aggregates, an part mix, one factors affecting properties. ...

Abstract The Gulf of Naples is an important centre endemism, well known from the floristic point view, but much less phytosociological one. In this paper we investigated non-forest vegetation focusing on communities rich in endemics. We described two as new: Eryngio amethystini-Santolinetum neapolitanae for garrigues limestone, Globulario neapolitanae-Loniceretum stabianae dolomitic rocks, both...

Natural fractures act as critical flow channels and reservoir space in the Lucaogou Formation tight of Jimsar Sag. It is essential to identify main controlling factors natural order achieve efficient development oil this area. There are mainly three types fractures, including tectonic diagenetic abnormal overpressure-induced fractures. Diagenetic predominantly bedding seams. The fracture affect...