Arimanwa3 1,3department of civil engineering, federal university of technology, owerri, nigeria 2department of civil engineering, enugu state university of science and technology, enugu, nigeria. They can be used as load bearing or partition blocks walls. Ajayi department of architecture, federal university of technology, akure, nigeria and department of forestry and wood technology, federal university of technology, akure, nigeria abstract. I abstract alternative methods of building material production without compromising on quality have become vital to researchers lately. Concrete block specification properties of concrete block. Concrete blocks and pavers mix design and manufacturing.
When you are ready to proceed, click combine button. The fine aggregate was replaced with crushed waste sandcrete block cwsb in various percentages in the steps of 10 starting from. Abstract this paper investigates the strength characteristics of sandcrete blocks in bosso and shiroro areas in minna, nigeria. Sandcrete blocks comprise of natural sand, water and binder. Finally, metallic flat base was used to further compact the mold mixture up to 4 times. In this present investigation the varying watercement ratio of the mortar joint which is frequent during construction process is taken into consideration. A concrete with compressive strength of 30nmm2 at 28 days hydration period was designed for normal mixture as the control. The production of sandcrete blocks using groundnut shell ash gsa as cement replacement was investigated. Sandcrete blocks, compressive strength, mix ratio journal of civil engineering research and practice vol. A comparative study of cement and lime stabilized lateritic.
Groundnut shell ash as a partial replacement of cement in. It was discovered that only the sandcrete blocked produced with dredged sand met the nigerian in download. Pdf optimum compressive strength of hardened sandcrete. Pdf sandcrete blocks and quality management in nigeria. Pdf the study investigated the use of fine sandcrete block waste fsbw as fine aggregate in the production of sandcrete blocks with a view of. The effectiveness and obstructs of sandcrete and concrete block in a foundation system abstract it is a clear fact that bricks play a vital role in a foundation system of a building. Study of compressive strength characteristics of hollow. Physicomechanical behaviour of sandcrete block masonry units. University of nigeria research publications name obodoh, dominic anosike pgm.
A study on the durability of solid sandcrete blocks samuel sunday omopariola department of works and services, the federal polytechnic, ilaro, nigeria. And when moulding, use one bag of cement for 30 blocks instead of 45 to. Full length research paper a study of the preference level. The use of rice husk ash in low cost sandcrete block. The compressive strength th of a concrete and sandcrete block reducess when w watercement ratio is high.
Deense concrete and sandcrete blocks are usedd forf the construction of mighty buildings such as shopping sh malls, auditoriums, churches, mosque ues and flats. Pdf effects of curing on the compressive strengths of. On the basis of the noted poor quality control, recommendations appropriate for improving the strength and effectiveness of sandcrete blocks production in nigeria are made. If you want to build a residential or commercial house, you had better mould your own blocks rather than buy from moulders. Strength properties of commercially produces sandcrete blocks. Products like sakrete top n bond and sakrete flocoat already contain polymers that greatly improve the bond of portland cement and should never be used with a liquid bonding agent.
Pdf establishing the compressive strength of sandcrete. Abstract 100mm and 125mm solid blocks are extensively used for building construction at idiroko area of ogun state in nigeria and environ with no record of known available data. Study of compressive strength characteristics of hollow sandcrete blocks partially replaced by international organization of scientific research 31 p a g e american society for testing materials astm c 6181978 specification as a siliceous and aluminous material. The materials used and method of manufacture employed in this investigation are thus presented. Cement, as a binder, is the most expensive input in to the production of sandcrete blocks 1. Sandcrete blocks have been manufactured manually and mechanically to meet the need of building due to the discovery of cement. Sandcrete blocks, compressive strength, mix ratio 1. The masonry units which are sandcrete blocks would consists of dry pressed units in order to maintain consistency in the masonry units used in this research. Sandcrete blocks and quality management in nigeria building industry. A study on the engineering properties of sandcrete blocks. Six number sandcrete blocks were cast for each replacement levels 0, 10,20,30,40, and 50 percentage with gsa. This has necessitated producers of sandcrete blocks to produce blocks with low opc content that will be affordable to people and with much gain.
Know the concrete or cement block size, weight specification, price, application and advantages of blocks. Cement, as a binder, is the most expensive input in to the production of sandcrete blocks. The chemical approach involved mixing up a liquid bonding agent that helps bond new concrete products to old. The results show that the compressive strength ranges from. This paper reports the results of a comparative study of cement and lime stabilized lateritic interlocking blocks produced with laterite samples from the olomi area in ogbomoso, oyo state, nigeria. Concrete blocks up to m15 grade and paver blocks up to m50 grade can be manufactured. Compressive strength of hollow sandcrete blocks in range of 0. Introduction the construction of structures is a regular operation which heavily involves sandcrete blocks for load. Mar 03, 2015 sandcrete blocks are widely used in nigeria as walling units and over 90% of houses in nigeria are being constructed of sandcrete blocks. Compressive strength of sandcrete blocks in bosso and shiroro areas of minna, nigeria m. Sandcrete blocks, brick molding, block molding, construction entrepreneurs. Basic masonry techniques autonopedia welcome to autonopedia. Apr 14, 2009 this paper is laboratory testfocused, and reports the results of investigation of the strength and density of sandcrete blocks based on a 1.
Materials of the sandcrete blocks the sandcrete blocks are made of sand, cement and water. Optimized compressive strength modeling of mixed aggregate in solid sandcrete production p. Sand sharp river quartzite sand that is free of clay, loam, dirt and any organic or chemical matter is used. This includes paving stones, retaining walls, masonry block and even concrete. This problem can cause some concern for the consumer as it temporarily detracts from the appearance of their project. Efflorescence is a naturally occurring deposit resembling white frost that can sometimes appear on any product made with cement.
This study considered the effects of curing on the compressive strength property of 150mm thick sandcrete blocks produced by commercial block industries in calabar south eastern nigeria. Pdf compressive strength of sandcrete blocks orjinta. Our servers in the cloud will handle the pdf creation for you once you have combined your files. Two hundred and seventyone sandcrete block models from four mixed proportions, namely 1. This modcl possesses the advantages of economy, and case of reformulation, as well as an inherent cognisance of the effect of the variation in the source of ingredients ol sandcrete blocks on thc str. Some engineering properties of sandcrete blocks containing.
To merge pdfs or just to add a page to a pdf you usually have to buy expensive software. Performance of lateritecement blocks as walling units in. They apply extreme vibrations to blocks and therefore are able to make concrete blocks at lower wc ratio resulting in lower binder content as compared to any other machines. Costs of alternative methods of acquiring sandcrete blocks. Sandcrete is usually used as hollow rectangular blocks similar to concrete masonry units, often 45 centimetres 18 in wide, 15 centimetres 5. Costs of alternative methods of acquiring sandcrete blocks for walling lawal1 p. The block and cube samples achieved compaction by combining vibration with compression. Dec 04, 2012 a study on the engineering properties of sandcrete blocks produced sandcrete blocks have been in used in many nations of the world including nigeria, materials and methods the differences in block size and block manufacturing. This indicates that these blocks are below the standard for loadbearing sandcrete blocks and cannot be used as load bearing walling units. This free and easy to use online tool allows to combine multiple pdf or images files into a single pdf document without having to install any software. May 29, 2017 sandcrete manufacture could be for solid blocks, hollow blocks.
The stabilizing agents were added at 5%, 10% 15%, 20%, and 25% by weight replacement levels. Compressive strength and costs of sandcrete blocks and blocks. Okpala the high and increasing cost of cement, coupled with its continuing scarcity has contributed to the nonrealization of adequate housing for both urban and rural dwellers in nigeria. This makes sandcrete blocks a very important material in building construction. Assessment of the quality of sandcrete blocks in use in. As per is 2185, the following physical parameters are required for solid concrete blocks a compressive strength after 28 days4mpa to 5mpa b water absorption by percentage of mass should be less than 10%. Pdf impact of quality control practices in sandcrete blocks.
Cement as a binder is the most expensive input into the production of sandcrete blocks and this has necessitated producers to produce blocks with low cement content, which is affordable to people 3. Pdf characterization of the compressive strength of sandcrete. Arimanwa, michael c, arimanwa, chinenye e, okere, chioma t. Sandcrete blocks and quality management in nigeria building. Manual molding was employed and the blocks cured in water for 28 days.
Obiadi who noted that mud or brick was used in the past before civilization changed it to sandcrete blocks, said. Mar 07, 20 how to make concrete blocks learn how hi sibley produces 100 concrete blocks per hour as he describes the concrete block manufacturing process. Interlocking blocks can also be of cement and sand content only. Theoretical framework quality is defined as fitness for purpose or compliance with specification anosike, 2011, taylor, 2002 the totality of features required by a product or service to. Compressive strength of sandcrete blocks in bosso and shiroro. In most cases, the producers of these weak sandcrete blocks and the users lack. The three types of sand dredged, river sand and dug out being used for the production of sandcrete blocks were obtained and used to produce 225mm x 225mm x 450mm sandcrete blocks and the blocks were tested for compressive strength. Compressive strength of manual and machine compacted. Abdullahi civil engineering department, federal university of technology minna, niger state, nigeria.
Establishing the compressive strength of sandcrete blocks produced in the central region, ghana. This study was carried out to investigate the strength properties of sandcrete blocks in adoekiti, akure and ileife, nigeria. Onuamah civil engineering department, enugu state university of science and technology, enugu, nigeria. Optimum compressive strength of hardened sandcrete. Comparing compressive strength of sandcrete blocks made with. Just upload files you want to join together, reorder them with draganddrop if you need and click join files button to merge the documents. Some engineering properties of sandcrete blocks containing rice husk ash daniel c. The blocks were cured and crushed at 7, 14, 21, and 28 days.
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