Abstract The main objective of the present research is to investigate effect adding wollastonite microfibers and waste tire rubber on mechanical properties concrete. For this purpose, two different series mixtures were considered. Different percentages (5, 10, 15, 20 percent) added ordinary concrete tested in first series. Then, second series, specimens amount 20% by weight cement, was replaced...

Composite materials are very promising biomaterials for hard tissue augmentation. The approach assayed in this work involves the manufacturing of a composite made of a bioactive ceramic, natural wollastonite (W) and a nanostructured copolymer of ethylmethacrylate (EMA) and vinylpyrrolidone (VP) to yield a bioresorbable and biocompatible VP-EMA copolymer. A bulk polymerization was induced therma...

Lapis lazuli is defined as a rock of varying composition. The following minerals have been identified in this rock by X-ray diffraction: lazurite, haüyne, sodalite, nosean, mica, diopside, wollastonite, calcite and pyrite. Among them the first two minerals, lazurite and haüyne, are responsible for the unique blue colour of massive lapis lazuli [1]. As it has been proved [2], the blue colour of ...

An IARC working group of 19 experts in chemical carcinogenesis and seven industrial or governmental observers met in October 1996 in Lyon to prepare updated monographs and evaluations on crystalline and amorphous silica, palygorskite (attapulgite), sepiolite, and wollastonite. Monographs on these agents were published previously in Volume 42 of the IARC Monographs (1). Also evaluated by the gro...

A series of Eu3+ and Eu2+ doped wollastonite is produced with a modified sol–gel technique using agricultural-food waste materials. Rice husk ash (RHA) eggshell (ES) are used as an usher for silica calcium oxide, appropriately, at different concentrations (0.0, 0.2, 0.4, 0.6, 0.8, 1 mol%). Most investigations have documented photoluminescence (PL) from ions caused by electronic transitions betw...