The effect of addition of (PG) on the grindability. Setting times and the mechanical properties of OPC and OPC-limestone cement was also investigated. 2.Experimental 2.1.Materials Industrial clinker used for the production of ordinary type I Portland cement (OPC-I, 42.5N). Limestone with CaCO3 content higher than 75% was used in our study. The chemical oxide composition of OPC clinker and lime stone theoretical phase ratios calculated by Bogue formulae are presented in Table 1.
The white makeup was also a useful aid to hiding the signs of aging. The white makeup substance was achieved with a mixture of vinegar and white lead. A safer alternative was a face paint made from plant roots and leaves. In Europe only the aristocracy used cosmetics. Sometimes arsenic was used in the white makeup instead of lead.
One approach to dispose of white spots on teeth and different indications of harm to your teeth is to make a remineralizing toothpaste that is rich in calcium and other essential elements. Ingredients like baking soda will likewise go about as abrasive elements to scrape off the white spots on your teeth and standardize the pH balance in your mouth. Making Remineralizing Tooth Powder In the event that you want to utilize tooth powders to brush your teeth rather than toothpaste, you can make a homemade remineralizing powder utilizing bentonite clay, which can draw out heavy metals and toxins from your teeth and mouth and reestablish the pH balance of your mouth. The clay is rich in minerals like calcium, magnesium, and silica, which help get rid of white spots on your teeth. Rinse With Green Tea A Few Times Each
The production of a single ton of Portland cement will produce about 870 kg of carbon dioxide emission. decarbonation of calcium carbonate(CaCO3) will produce 80% of carbon dioxide emission. In the other hand celitement causes 50% less carbon dioxide. Figure 1. shows that Portland cement clinker is only made of the main mineral tricalcium silicate Alit (Ca3SiO5). The burning process of the raw material will produce carbon dioxide from calcium carbonate in three constructive parts.
The choice of the pavement type is decided by the amount of traffic loading which is applied to the road. Roads with low traffic volumes do not have high traffic loading and hence do not need a pavement with a high bearing capacity. As the subgrade material has been investigated, a corrective measure can be decided. In cases where the subgrade is very weak and has a low bearing capacity, the material is required to be treated, to be strengthened or superior material must be brought in. In the case of roads with low traffic volumes, it is assumed that the structural layers should be supported by G9/G10 (TRH4, 1996) quality
How to Get White Teeth The use of professional products are the means for how to get whiter teeth fast. However, there may be expensive and not an option for many people. The use of a natural method or home remedy can lead to a desired result. This will be a great option for anyone who has yellow teeth that is doe to smoking, the drinking of coffee or tea, and poor dental
II.MATERIALS AND METHOD A. Materials Ordinary Portland Cement: Dangote brand of ordinary Portland cement with properties conforming to BS 12 was used in this study. Steel Slag: Steel slag was obtained as a by-product of the production of iron. Calcium aluminate: This was bought from marketers of industrial chemicals. Aggregates: The coarse aggregate from crushed granite was collected from igneous origin.
CHAPTER 1 INTRODUCTION 1.1 GENERAL Concrete made with Portland cement has certain characteristics: Concrete relatively strong in compression where as weak in tension and tends to be brittle. Another reason behind weakness of the concrete is that cracks start to form when concrete is placed and before it gets fully hardened. The cracks are major factor of weakness in concrete in large onsite applications leading to subsequent failure, generally lack of durability and fracture. The weakness in tension of concrete can be overcome by the use of conventional steel bar reinforcement and to some inclusion of a sufficient volume of fibers. Polypropylene (PP) is made by synthetic hydrocarbon polymers which are extracted by the processes of hot drawing
However the first prepared effort on mass scale to manufacture Portland cement started in Madras (Washermanpet), in 1904, through South India Industries constrained (Cement producers affiliation 1964; Gadhok 2000). The manufacturing unit couldn't be triumphant as a result it failed. However, it turned into in 1914 that the first commissioned cement-manufacturing unit in India changed into set up with the aid of India Cement Company limited at Porbandar, Gujarat, with an set up capacity of 10,000 tonnes and manufacturing of a thousand tones. Sooner or later two floras; one at Katni (M.P.) and another at Lakheri (Rajasthan) have been set up.
A typical rigid pavement consists of three components: - (1) Soil sub grade (ii) Base course (iii) Surface course (i) Soil sub-grade:- The Sub-grade is the foundation layer, the structure which must eventually support all the loads which come on to the pavement. The performance of the pavement is affected by the characteristics of the sub-grade. Desirable properties which the sub-grade possesses are: strength, drainage, ease of compaction permanency of strength. The strength of the sub grade is increased by compaction or in some cases by stabilization. (ii) Sub-base course:-A sub base is a layer of material between the base and sub-grade.