Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
CRUSHED AMBO SANDSTONE AS A PARTIAL REPLACEMENT OF SAND FOR C-25 CONCRETE PRODUCTION
The construction industry in Ethiopia is rapidly growing from time to time. The need for materials used for this industry is increasing. One of the construction materials is concrete. Conventionally concrete made by aggregate and binders. Mostly river sand used as fine aggregate in concrete mixtures. The utilization of river sand in concrete production depleted natural resource of sand and increases the cost because of scarcity. This study was conducted to see the suitability of crushed Ambo sandstone as a replacement of fine aggregate in C-25 concrete production. Initially, river and crushed Ambo sandstone samples to be used in the concrete mixes were collected and their physical properties were studied. Five different concrete mixes having five mix proportions for both river and crushed Ambo sandstone (i.e. 100%NS+ 0%MS; 75%NS+25%MS; 50%NS+50%MS; 25%NS+75%MS and 0%Ns+100%MS) were prepared for C-25 concrete strengths using a water-cement ratio and cement contents of 0.5. Three samples were made for each mix design. The properties of these mixes have then been assessed both at fresh and hardened state. There were nine samples of concrete cubes prepared and tested at 7th, 14th, and 28th days for concrete compressive strength with a mix ratio of 1:2:3 and water to cement ratio of 0.50. Based on the laboratory test results with full replacement of river sand by Crushed Ambo Sandstone, given the mean compressive strengths at 7th day was 21.66 MPa, while at the 14th day was 26.74MPa, and at 28th day was 34.68 MPa. It means that; it satisfied the requirement for C-25 grade concrete. As the cost of production of the fine aggregate of Ambo Sandstone quarry was 140 ETB per cubic meter, while the price of river sand from Legeher Market was 300 - 400 ETB per cubic meter. Therefore, Crushed Ambo Sandstone possesses minimum price than the river sand. However, it must be given emphasis that the crushed Ambo Sandstone must be washed thoroughly before use in construction projects.
CRUSHED AMBO SANDSTONE AS A PARTIAL REPLACEMENT OF SAND FOR C-25 CONCRETE PRODUCTION
The construction industry in Ethiopia is rapidly growing from time to time. The need for materials used for this industry is increasing. One of the construction materials is concrete. Conventionally concrete made by aggregate and binders. Mostly river sand used as fine aggregate in concrete mixtures. The utilization of river sand in concrete production depleted natural resource of sand and increases the cost because of scarcity. This study was conducted to see the suitability of crushed Ambo sandstone as a replacement of fine aggregate in C-25 concrete production. Initially, river and crushed Ambo sandstone samples to be used in the concrete mixes were collected and their physical properties were studied. Five different concrete mixes having five mix proportions for both river and crushed Ambo sandstone (i.e. 100%NS+ 0%MS; 75%NS+25%MS; 50%NS+50%MS; 25%NS+75%MS and 0%Ns+100%MS) were prepared for C-25 concrete strengths using a water-cement ratio and cement contents of 0.5. Three samples were made for each mix design. The properties of these mixes have then been assessed both at fresh and hardened state. There were nine samples of concrete cubes prepared and tested at 7th, 14th, and 28th days for concrete compressive strength with a mix ratio of 1:2:3 and water to cement ratio of 0.50. Based on the laboratory test results with full replacement of river sand by Crushed Ambo Sandstone, given the mean compressive strengths at 7th day was 21.66 MPa, while at the 14th day was 26.74MPa, and at 28th day was 34.68 MPa. It means that; it satisfied the requirement for C-25 grade concrete. As the cost of production of the fine aggregate of Ambo Sandstone quarry was 140 ETB per cubic meter, while the price of river sand from Legeher Market was 300 - 400 ETB per cubic meter. Therefore, Crushed Ambo Sandstone possesses minimum price than the river sand. However, it must be given emphasis that the crushed Ambo Sandstone must be washed thoroughly before use in construction projects.
CRUSHED AMBO SANDSTONE AS A PARTIAL REPLACEMENT OF SAND FOR C-25 CONCRETE PRODUCTION
ASHENAFI G/MESKEL (Autor:in) / Dr. Habtamu Hailu (Autor:in)
01.01.2018
doi:10.20372/nadre:1550988919.93
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
Crushed Post-Consumer Glass as Partial Replacement of Sand in Concrete
| British Library Conference Proceedings | 2001
Durability of high performance concrete using crushed sandstone sand as fine aggregate
| British Library Conference Proceedings | 2006