A Production Possibility of Hydraform Block as Walling Material for Affordable Housing in Jigjiga
| dc.contributor.advisor | Dinku, Abebe(Professor) | |
| dc.contributor.author | Beshir, Abdulkadir | |
| dc.date.accessioned | 2018-06-29T11:54:38Z | |
| dc.date.accessioned | 2023-11-11T08:29:44Z | |
| dc.date.available | 2018-06-29T11:54:38Z | |
| dc.date.available | 2023-11-11T08:29:44Z | |
| dc.date.issued | 2015-04 | |
| dc.description.abstract | Adequate shelter is a basic human need, while about 75% of the urban populations in developing countries still live in unplanned settlements as they cannot afford the high cost of building materials. The Hydraform block (HFB) has been identified as low-cost building material with its potential and possibility to reverse the housing problem in Somali region especially in Jigjiga area. The main objective of this research was to investigate the potential and production possibility of Hydraform blocks (HFB) in Jigjiga area. The researcher examines by addressing the traditional housing system in Ethiopian Somali Region in the literature review and the production possibility of Hydraform blocks in Ethiopian Somali Region areas. This can be done by identifying the physical properties of the soil as well as its chemical composition through laboratory experiments, detailed data analysis and determination of soil composition. Its physical, chemical and biological properties, the block properties and behavior are investigated. According to the African Regional Standard code of practices the Karamara soil composition gives satisfactory result. While Garab-Ase soil does not fulfills the specification of the soil blocks recommended to some extent. This can be solved by clearly sieving the soil by the specified sieve sizes which fulfill the recommended sizes and putting the soil into the specified gradation to produce good quality of Hydraform blocks. The chemical analysis for the Garab-Ase soil showed that the amount of SiO2, CaO, Al2O3 and SO3 were 10%, 33.7%, 0.022% and 0.5% respectively. In the hydration reaction the major components of cement such as dicalcium silicate (C2S) and tri-calcium silicate (C3S) form a mono and dicalcium silicate hydrate gels (C3S2H3) in the presence of damp soil and removal of free lime from the reaction (3Ca(OH)2). Then the free lime further react with the clay fraction (pozzolanic reaction) there by removing the silica from the clay minerals and subsequently forms more calcium silicate gel. The calcium silicate gel gradually crystalize in to insoluble interlocking matrix throughout the soil voids binding the soil particles together (Asmamaw.T, Abebe .D, 2008). The acidic contents of the soil matters the hydration reaction, but the PH (6.5) of the Garab-Ase soil falls in good reactive soil. The Garab-Ase soil has a SO3 content of 0.5% which reduces the percentage of sulphates to be produced in the reaction that matters overall the strength of the Hydraform block. XII The compressive strength results also show that from the blocks produced at the varying cement contents from 6% in increments of 2% up to 10% at constant compaction pressure of 10MPa, all the blocks have 28 day wet compressive strength values well above most of the recommended minimum values for use in nonstructural work as per the literatures. The thesis result concludes that it is possible to produce Hydraform blocks using Jigjiga soil, so that it fulfills the compressive strength, uses less cement content and adaptable to the environment as walling material for the low-cost housing. The use of hydraulic machine increases more its strength and reduces the air voids through compaction pressure. The results of this research work have shown that Hydraform block can be used as an alternative wall making material using Jigjiga soil. Significant cost cut can be achieved in low cost housing projects especially town houses. So any concerned body can use this material as an alternative wall making material with proper quality control. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/5044 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Jigjiga | en_US |
| dc.title | A Production Possibility of Hydraform Block as Walling Material for Affordable Housing in Jigjiga | en_US |
| dc.type | Thesis | en_US |