Calcium oxide

About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.

Deep stabilisation using lime

Abstract: The paper outlines the principles behind the improvement to soils in the form of lime piles, lime columns and lime slurry pressure injection. Lime columns are used primarily as an alternative to stone columns for stabilising soft soils, but have been used for slope stability. Lime piles have similar applications but pressure injection is mainly used in slope stability. Potential UK applications of the techniques are discussed. A review is given of research, using both laboratory studies and field studies, carried out at Loughborough University into lime-clay mixing, and more particularly, the use of lime piles for slope stabilisation. The main findings of the research are utilised to provide indicators of how the other deep stabilising techniques might be investigated and introduced into UK practice. For the covering abstract see IRRD 887532.

The effect of the material factors on the concrete resistance against carbonation

Abstract: The carbonation is one of the main factors to cause the degradation of the properties in the reinforcement concrete structures In this study, the effect of the material factors, ie the type and the particle size of cement, the calcium oxide content in the fly ash, the fineness modulus of fine aggregate, the types and the dosages of superplasticizers (SPs), on the carbonation properties of the concrete was studied The carbonation coefficient (K) values of the concrete mixtures with various material factors were obtained The control indexes of the material to resist against carbonation of the reinforced concrete were proposed The test results show that the type and the particle size of cement, the calcium oxide content in the fly ash and the types of SPs have the significant influence on the carbonation coefficient (K) The concrete mixture with the excellent resistance against carbonation can be prepared by using cement with the fine particle size and the high-calcium fly ash and the PCA SP of lower dosage in the concrete

Photocatalytic hydrophilifiable material

Abstract: A composite material includes a substrate and a self-cleanable hydrophilic surface layer. The surface layer includes a plurality of components: a first component having a photocatalyst which functions as a catalyst upon exposure to light; a second component having one or more of aluminum oxide, zinc oxide, strontium oxide, barium oxide, magnesium oxide, calcium oxide, rubidium oxide, sodium oxide, potassium oxide and phosphorus pentoxide; and a third component having one or more of silicon dioxide, zirconium dioxide, germanium dioxide and thorium dioxide. The first through third components are all situated within the surface layer, which is provided as a single surface layer, such that all of the components are in close proximity to one another within the single surface layer.

Article coated with water-repellent film, liquid composition for coating with water-repellent film, and process for producing article coated with water-repellent film

Abstract: There are provided articles coated with high-performance water-repellent films with high hardness that can withstand outdoor use, which are water-repellent film-coated articles that comprise a substrate and a water-repellent film composed mainly of silicon oxide and having a water-repellent group coated on the surface of the substrate, and are characterized by containing at least one type of metal oxide selected from the group consisting of magnesium oxide, calcium oxide, strontium oxide and boron oxide, as well as a process for preparation of such water-repellent film-coated articles at a high rate of productivity and a coating liquid composition for preparation of such water-repellent film-coated articles.