Calcium silicate blocks shall comply with bs en 771. This work finds a way in which lateritic soil within ota, ogun state of nigeria could be used in the production of hollow sandcrete blocks. Comparison of locally excavated sand with river sand in terms of strength in sandcrete blocks with abstract, chapter 15, references and questionnaire. 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. The production of sandcrete blocks using groundnut shell ash gsa as cement replacement was investigated. A concrete with compressive strength of 30nmm2 at 28 days hydration period was designed for normal mixture as the control. Cement concrete hollow blocks are usually of the following three dimensions. Assessment of sandcrete blocks manufacturers research india. Compressive strength of sandcrete blocks in bosso and shiroro areas of minna, nigeria m. Comparison of locally excavated sand with river sand in terms. Optimum compressive strength of hardened sandcrete. The data of this article examined compliance level to minimum standard requirements among sandcrete block manufacturers in south western nigeria.
Materials and methods constituent materials used in the production of samples of sandcrete blocks tested in the laboratory are. The prominence of sandcrete blocks as part of the local building materials that make up the wall units in a building or any construction work cannot be underestimated because houses are mostly built of blocks. Sandcrete blocks are the most prominent of the concrete masonry units in the building industry today especially in the construction of residential, industrial and. Sandcrete manufacture could be for solid blocks, hollow blocks. Pdf effects of curing on the compressive strengths of. Finally, metallic flat base was used to further compact the mold mixture up to 4 times. An appraisal of the quality control practices in sandcrete. This makes sandcrete blocks a very important material in building construction. The study investigated the use of fine sandcrete block waste fsbw as fine aggregate in the production of sandcrete blocks with a view of controlling waste and decongesting block molding production sites. 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. Structural evaluation of lightweight concrete produced using waste newspaper and office paper. Emmanuel bamfoagyei department of building technology, cape coast polytechnic, cape coast, ghana sandcrete block is one of the common materials.
Sandcrete blocks, brick molding, block molding, construction entrepreneurs. This study was carried out to investigate the strength properties of sandcrete blocks in adoekiti, akure and ileife, nigeria. Sandcrete blocks comprise of natural sand, water and binder. Quality assessment of sandcrete blocks produced in adeta, kwara state. 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. Sandcrete is unsuitable for loadbearing columns, and is mainly used for walls, or for foundations if no suitable alternative is available. A study on the durability of solid sandcrete blocks samuel sunday omopariola department of works and services, the federal polytechnic, ilaro, nigeria. This paper examines the quality of machinevibrated hollow sandcrete blocks used on construction sites in lagos metropolis. Also, the water absorption is lower in blocks with cement grade 42. Thirty two 32 samples were moulded from the two brands of cement i. The results show that the compressive strength ranges from.
This paper investigates the strength characteristics of sandcrete blocks in yola 8 0 3647 n 12 0 1914 e metropolis. Arimanwa, michael c, arimanwa, chinenye e, okere, chioma t. Iiard international journal of environmental research. Eighteen commercially produced sandcrete blocks were picked randomly from each of the selected states, three 3 blocks from each state. Suitability of commercially available sandcrete blocks in.
Concrete blocks technical data short description concrete block construction has gained importance and has become a valid alternative to fired clay bricks. Abstract this paper investigates the strength characteristics of sandcrete blocks in bosso and shiroro areas in minna, nigeria. Strength properties of commercially produces sandcrete blocks. Determination of safe weight limit of sandcrete block for. The low standard of sandcrete blocks was as a result of poor mixdesign, inadequate production process, insufficient curing period,, and lack of governmental agency and professional control. An appraisal of the quality control practices in sandcrete blocks production in yewa south area of ogun state, nigeria samuel sunday omopariola department of works and services, the federal polytechnic, ilaro, nigeria abstract. Architects, engineers, planners, designers, students.
Assessment of structural strength of commercial sandcrete blocks. Costs of alternative methods of acquiring sandcrete blocks. Comparison of locally excavated sand with river sand in. This paper examines the quality of machinevibrated hollow sandcrete blocks used on. Compressive strength of manual and machine compacted. A wide variety of sandcrete block making machine options are available to you, such as automatic, type, and method. Compressive strength of sandcrete blocks in bosso and. Some engineering properties of sandcrete blocks containing. Study of compressive strength characteristics of hollow. Physicomechanical behaviour of sandcrete block masonry units. Also the area of application of both the sandcrete and concrete blocks are stated in chapter two of this report. Densities of the lateritecement and sandcrete blocks were determined in accordance with 17 and the results are shown in table 2. Assessment of sandcrete blocks manufacturers compliance to minimum standard requirements by standard organisation of nigeria in southwest, nigeria. Six number sandcrete blocks were cast for each replacement levels 0, 10,20,30,40, and 50 percentage with gsa.
The poverty level amongst west african countries and particularly nigerian has made these blocks. And when moulding, use one bag of cement for 30 blocks instead of 45 to. The production of sandcrete block started with hand i. It was named portland cement because it looked like the. Abstract this paper investigates the strength characteristics of sandcrete blocks in. Cement, as a binder, is the most expensive input in to the production of sandcrete blocks. Also uniaxial compressive strength of hollow sandcrete blocks is defined on the basis of.
The final compressive strength of sandcrete can be as high as 4. Experimental datasets on compliance level to minimum standard. This has necessitated producers of sandcrete blocks to produce blocks with low opc content. Sandcrete blocks and quality management in nigeria. University of nigeria research publications name obodoh, dominic anosike pgm. Pdf assessment of properties of sandcrete blocks produced by. Determination of safe weight limit of sandcrete block for block moulders. This showed that most of sandcrete blocks sold to the general public in south west were of low standard. 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. The load carrying capacity of hollow sandcrete blocks j. This replacement is intended to develop more economic sandcrete blocks since the cost of lateritic soil in ota is much less than the cost of the conventional fine aggregate used in the production of sandcrete blocks without compromising the intergrity of.
U nwoji department of civil engineering, university of nigeria, nsukka corresponding author. Strength properties of commercially produces sandcrete. On this post, im going to explain the concept of cement block manufacture and i hope youre going to learn a lot from it. The study revealed that compaction has greater effect on the compressive strength of sandcrete blocks in the sense that blocks produced using vibrating machine has the highest compressive strength amongst the three methods. Every necessary procedures and cautions for good masonry wall units were ensured with 25 strokes of blow for sound compaction. The pdf file you selected should load here if your web browser has a pdf reader plugin installed for example, a recent version of adobe acrobat reader if you would like more information about how to print, save, and work with pdfs, highwire press provides a helpful frequently asked questions about pdfs alternatively, you can download the pdf file directly to your computer, from where it. From the test results, the density of sandcrete blocks is higher in grade 42. May 29, 2017 sandcrete manufacture could be for solid blocks, hollow blocks. Journal of engineering, project, and production management. Properties of concrete while cement in one form or another has been around for centuries, the type we use was invented in 1824 in britain.
This research investigated and compared the strength of manual with machine compacted sandcrete hollow blocks using dangote and elephant ordinary portland cement brands in nigeria. 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. Sandcrete blocks have been manufactured manually and mechanically to meet the need of building due to the discovery of cement. Abdullahi civil engineering department, federal university of technology minna, niger state, nigeria. Effects of curing on the compressive strengths of commercial sandcrete blocks in calabar nigeria. Part 2 and shall have a minimum compressive strength of 5 nmm2 unless otherwise stated. A mathematical model for prediction of the strength of sancrete cement block application of henry scheffes and osadebes concrete optimisation theory abstract sandcrete blocks are prismatic units manufactured from lean sand cement mortar mixes and are the predominant walling materials used in buildings in nigeria and other countries. Structural evaluation of lightweight concrete produced. 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. Two hundred and seventyone sandcrete block models from four mixed proportions, namely 1. And also that the strongness and weakness of a building depends solidly on the methods employed in moulding the bricks which are used in laying the foundation of a building.
Properties of concrete concrete is an artificial conglomerate stone made essentially of portland cement, water, and aggregates. The essential ingredients of concrete are cement, aggregate sand, gravel and water. This paper is laboratory testfocused, and reports the results of investigation of the strength and density of sandcrete blocks based on a 1. Cost optimization of sandcrete blocks through partial. Furthermore, the method, and steps employed in moulding a block is also emphasized. This paper investigates the strength properties of. The load carrying capacity of hollow sandcrete blocks. The paper focuses on the appraisal of quality control practices by commercial block manufacturers.
Determination of safe weight limit of sandcrete block. Compressive strength of sandcrete blocks in bosso and shiroro. Sandcrete blocks are widely used as walling units in nigeria. Compressive strength and costs of sandcrete blocks and. Pdf quality assessment of sandcrete blocks produced in. Pdf assessment of sandcrete blocks manufacturers compliance. Some engineering properties of sandcrete blocks containing rice husk ash daniel c. Compressive strength and costs of sandcrete blocks and blocks.
Sandcrete blocks and quality management in nigeria building. To download the pdf, click the download link above. The fine aggregate was replaced with crushed waste sandcrete block cwsb in various percentages in the steps of 10 starting from. A mathematical model for prediction of the strength of sandcrete cement block a mathematical model for prediction of the strength of sancrete cement block application of henry scheffes and osadebes concrete optimisation theory abstract sandcrete blocks are prismatic units manufactured from lean sand cement mortar mixes and are the predominant walling materials used in buildings i. This has necessitated producers of sandcrete blocks to produce blocks with low opc content that will be affordable to people and with much gain.
Physicomechanical behaviour of sandcrete block masonry. 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. An easy in use and free online library of cad blocks was designed to facilitate and speed up your workflow. Abstract sandcrete blocks comprise of natural sand, water and binder. Groundnut shell ash as a partial replacement of cement in. Pdf establishing the compressive strength of sandcrete blocks. Assessment of the quality of sandcrete blocks in use in.
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. The blocks were cured and crushed at 7, 14, 21, and 28 days. Although hollow blocks of all the three sizes could be made using the same machinery. Find, read and cite all the research you need on researchgate. Pdf intensive use of sandcrete hollow blocks in building production has made it essential building materials in. Sandcrete blocks have been in use in many parts of the world for a very long time. Costs of alternative methods of acquiring sandcrete blocks for walling lawal1 p. Concrete blocks are produced in a large variety of shapes and sizes.
Findings from the socalled readymade hollow sandcrete blocks sold by some. Alternatively, you can download the pdf file directly to your computer, from. Assessment of the quality of sandcrete blocks in use in owerri imo state, southeast nigeria joan i. 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. Alternatively, you can download the pdf file directly to your computer, from where it can be opened using a pdf reader. If you want to build a residential or commercial house, you had better mould your own blocks rather than buy from moulders. The pdf file you selected should load here if your web browser has a pdf reader plugin installed for example, a recent version of adobe acrobat reader if you would like more information about how to print, save, and work with pdfs, highwire press provides a helpful frequently asked questions about pdfs. I abstract alternative methods of building material production without compromising on quality have become vital to researchers lately. Experimental datasets on compliance level to minimum. Intensive use of sandcrete hollow blocks in building production has made it essential building materials in. A mathematical model for prediction of the strength of sandcrete cement block a mathematical model for prediction of the strength of sancrete cement block application of henry scheffes and osadebes concrete optimisation theory abstract sandcrete blocks are prismatic units manufactured from lean sand cement mortar mixes and are the. Cost analysis at the time of this study was conducted on the basis of one square metre of wall for lateritecement and sandcrete blocks respectively and the results are shown in table 2.
Special shaped blocks, required to form proper bonding, which cannot be made in a standard blockmaking machine may be made in approved wooden moulds. Nigerian journal of technology african journals online. Nigerian journal of technology african journals online ajol. Download this pdf file canadian center of science and education.
368 1105 1091 482 1056 978 72 517 1528 1292 400 567 1200 578 510 575 1511 1419 845 1463 1014 871 854 514 795 987 1091 1428 876 669 1417 1229 811 720 255 35 584 284 1284 998 748 841 809 1412 441 476