A study of some Physical Properties of Clay Brick Composed of Silt and kaolin Clay

Abstract

Three brick clay samples were prepared by mixing the garirh earth from Jazeera state and kaolin from North state with different percentages for three samples. The refractory bricks components, were for sample-1 (75% garirh, 25% kaolin), sample-2 (70% garirh, 30% kaolin), and sample-3 (80% garirh, 20% kaolin). The specific heat capacity of the three samples and the thermal conductivity were calculated. The three samples were analyzed using a Canberra 35+ device and the concentrations were obtained. The results of the thermal conductivities of the brick sample products were found to decrease from 0.0261 (W/m K) for the sample-1(75% garirh, 25% kaolin) to 0.01799(W/m K) for the sample-3 (i.e. ~32%), for the sample 80% garirh, 20% kaolin. A device assembled by the researcher Mohamed Ishag measured the humidity ratio of the three samples. It is an electronic device consisting of a port connected to LCD water screen to display the reading of humidity inside and outside the room, and a microcontroller of 16L mega, which was programmed by the computer using the program Bas com AVR and the data was then transferred to the electronic port. Finally, two DHT11 sensors were used to measure the internal and external humidity. The reading were recorded every hour after performing measurements of the humidity of the three samples, a graph with the ratio of humidity versus the time of each sample was drawn from 6 am to 10 pm. The results of all three samples were obtained, all of which showed high humidity in the morning, and very low humidity at noon interval, then it rises and becomes very high at evening again. The idea of a humidity Sensor was transferred to the humidity meter by an electronic circuit assembled by the researcher which consists of microcontrollers and the computer program as basic components.

The researcher concluded that in the hot area, the best sample of the refractory bricks samples was sample-3, which consists of (70 % garirh, 30 % kaolin). While in the humid areas, the best sample was sample 1. It is made up of (75% garirh and 25% kaolin).