Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
INVESTIGATION ON QUALITY CONTROL FOR CONCRETE MAKING MATERIALS USED IN COST EFFICIENT HOUSING PROJECT
Concrete is the most widely used construction material in the world. Good concrete, whether it is plain, reinforced or prestressed, should be strong enough to carry superimposed loads during its anticipated life. To deal about good quality concrete, quality control plays a significant role because qualities of these ingredients and their production process could affect the overall quality of buildings to a higher extent. The study focusing on Investigations on quality control for concrete materials has been conducted in projects administered by Addis Ababa Housing Project found in koye fetch sites. The research is carried out by collecting data on qualities of ingredients and method of production through questionnaires and observation and sample compressive strength test result from consultant data file to check their compliance with the help of statistical analysis and minimum strength requirement set on recommended standards and comparing result found with Ethiopia Standard and for best decision making purpose Mat lab was used. According to Ethiopia Code of Standard there was compliance and noncompliance, from statistical analysis the mechanism. The findings of the investigation have shown that in all construction sites, sufficient tests are not conducted for all ingredients used for production of concrete. Among those ingredients, sand testes by some sites for its silt content using jar test, observation and or both. In addition to this, handling of those ingredients were very poor, during observation intermixing coarse and fine aggregate, grass grown on the top of sand, were shown and production process also not conducted properly as specified in the recommended standards. Quality problem will occur when cement is in contact with damp air or moisture it sets more slowly and has less strength than cement that is kept in dry condition, presence of soft particles and organic materials in combination with aggregate may form a coating and may weaken the bond between cement paste and aggregate. The amount of water cement ratio in the concrete must be maintained in order to produce good quality concrete otherwise poor quality will produce.
INVESTIGATION ON QUALITY CONTROL FOR CONCRETE MAKING MATERIALS USED IN COST EFFICIENT HOUSING PROJECT
Concrete is the most widely used construction material in the world. Good concrete, whether it is plain, reinforced or prestressed, should be strong enough to carry superimposed loads during its anticipated life. To deal about good quality concrete, quality control plays a significant role because qualities of these ingredients and their production process could affect the overall quality of buildings to a higher extent. The study focusing on Investigations on quality control for concrete materials has been conducted in projects administered by Addis Ababa Housing Project found in koye fetch sites. The research is carried out by collecting data on qualities of ingredients and method of production through questionnaires and observation and sample compressive strength test result from consultant data file to check their compliance with the help of statistical analysis and minimum strength requirement set on recommended standards and comparing result found with Ethiopia Standard and for best decision making purpose Mat lab was used. According to Ethiopia Code of Standard there was compliance and noncompliance, from statistical analysis the mechanism. The findings of the investigation have shown that in all construction sites, sufficient tests are not conducted for all ingredients used for production of concrete. Among those ingredients, sand testes by some sites for its silt content using jar test, observation and or both. In addition to this, handling of those ingredients were very poor, during observation intermixing coarse and fine aggregate, grass grown on the top of sand, were shown and production process also not conducted properly as specified in the recommended standards. Quality problem will occur when cement is in contact with damp air or moisture it sets more slowly and has less strength than cement that is kept in dry condition, presence of soft particles and organic materials in combination with aggregate may form a coating and may weaken the bond between cement paste and aggregate. The amount of water cement ratio in the concrete must be maintained in order to produce good quality concrete otherwise poor quality will produce.
INVESTIGATION ON QUALITY CONTROL FOR CONCRETE MAKING MATERIALS USED IN COST EFFICIENT HOUSING PROJECT
MEKDESE TESEMA MESERET (Autor:in) / Girmay kahasay(Ph.D.) (Autor:in)
01.01.2018
doi:10.20372/nadre:1551763417.94
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
| BASE | 2017
| Engineering Index Backfile | 1953
Private low cost housing project
Engineering Index Backfile | 1947
Concrete features Chicago housing project
Engineering Index Backfile | 1944