compressive strength of sandcrete

The compressive strength of sandcrete blocks is affected by the mix proportion, quality of material used in making them, size, shape, and the mode of manufacture (i.e. hand or machine mould). Physical conditions such as method and days of curing, duration of time, temperature etc will also contribute to the strength of the block (Dhir, 1980).

Studies indicate that traditional concrete's tensile strength varies between 300 and 700 psi, i.e., around 2 to 5 MPa. This means, on average, the tension averages about 10% of the compressive strength. Flexural Strength Of Concrete. Flexural strength establishes the ability of concrete to withstand bending.

Sandcrete Blocks (NIS 87 [1]), which provides a guide for producing sandcrete blocks of acceptable quality. This standard describes different types and classes of sandcrete in terms of shapes, sizes, and compressive strength. The lowest strength class requirements are 2.5 N/mm2 and 3.45 N/mm2 for individuals and a minimum of five blocks ...

Compressive Strength Test – this guides to determine the compressive strength of both the sandcrete and quarry dust blocks respectively. The results obtained from these tests together with the conceptual theory formed the basis upon which conclusion …

18.4.2 When the specified strength is 5000 psi or less, no individual strength test (average of two cylinder tests) shall be more than 500 psi below the specified strength, f ' c Let's say a project is specified with f ' c, minimum required compressive strength of 4500 psi with a …

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. Commercial sandcrete blocks were randomly selected from ten (10) block moulding sites and cured in the Concrete and Materials Laboratory of the Cross River University of Technology, Calabar for 7, 14, …

the least unit compressive strength of the 225mm (9") sandcrete blocks was 0.63N/mm2 while the average compressive strength of the 225mm (9") blocks was 0.94 N/mm2 these values fall below the standard prescribed for load bearing sandcrete blocks. The Nigerian industrial standard specified that the lowest compressive strength of individual ...

the compressive strength of hollow sandcrete blocks on the other hand. The theoretical optimum cavity size, web thickness and cavity number that would yield the highest strength was investigated by Agunwamba et al. [6]. The hollow blocks were analysed as two-way slabs and the loads on the web ...

the compressive strength of sandcrete blocks decreases as the percentage of laterite content increases. The method of compaction used has a significant influence on the compressive strength of the block. The blocks produced by machine compac-tion method have higher compressive strength than the blocks produced by hand compaction method.

Jan 06, 2019· The compressive strength of concrete can be calculated by dividing the load applied on the concrete cube at the point of failure by the cross-section area of the cube (15x15x15 cm) on which load was applied.. The concrete compressive strength for normal construction work varies from 15 MPa (2200 psi) to 30 MPa (4400 psi) and more in commercial and industrial structures.

wall. Sandcrete blocks are widely used as walling units and over 90% of houses in Nigeria are being constructed of sandcrete blocks (Baiden and Tuuli, 2004). In the hardened state, sandcrete has a high compressive stress and this strength increase with density. The range of minimum strength specified in NIS 87:2007 is between 2.5N/mm2 to 3.45N/mm2.

COMPRESSIVE STRENGTH OF COCOA POD ASH BLENDED SANDCRETE BLOCKS PRODUCED IN OSOGBO, NIGERIA 1. Department of Civil Engineering, Osun State University, Osogbo, NIGERIA Abstract: The problem of non-uniformity in the sandcrete blocks production process practiced across the broad spectrum by

The compressive strength of the concrete cube test provides an idea about all the characteristics of concrete. By this single test one judge that whether Concreting has been done properly or not. Concrete compressive strength for general construction varies from 15 MPa (2200 psi) to 30 MPa (4400 psi) and higher in commercial and industrial ...

The Study Of Compressive Strength Characteristics Of Hollow Sandcrete Blocks Partially Replaced By Saw Dust Ash of Popoola, Ayegbokiki and Gambo(2015) says that The high cost of conventional Building materials is a major factor affecting housing delivery in Nigeria. This has necessitated research into alternative materials of construction. This paper presents the results of an investigation ...

Compressive strength of sandcrete blocks are determined on the as-cast surface which is a function of the area available to resist loads (Yusuf A, 2010). This study is therefore aimed at investigating the compliance level of sandcrete block factories in Minna metropolis with regards to …

All the information available sandcrete block industries has be ignored for their own benefit. 1.3 AIM AND OBJECTIVES This study is aimed at investigating the compressive strength of commercial produced sandcrete block in Eket, Akwa Ibom State and also verify if it meets the recommended standard as stated in NIS 87: 2000.

Compressive strength, and Density tests were done before crushing. For the purpose of this study, sixty (60) numbers of 450mm x 150mm x 225mm sandcrete blocks was produced. 2-3 Determination of the Compressive strength The compressive strength were done by crushing Sandcrete blocks of sizes 450mm x 150mm x 225mm on a

Also, the compressive strength of the cubes increases with increase in the saturated surface dry density as shown in fig. 2. From table 3, the compressive cube strength ranges from 3.49N/mm² to 7.11N/mm², which are higher than the minimum compressive strength of sandcrete block by NIS 87:2007 ranging from 2.5N/mm² to 3.45N/mm².

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. It was discovered that only the sandcrete blocked produced with dredged sand met the Nigerian In.

compressive strength of the sandcrete blocks was found to be below standard. The compressive strength of individual block tested was between 0.1 IN/mm2 and 0.75 N/mm2 while the average compressive strength of five blocks selected randomly were between 0.14 N/mm2 and 0.66 N/mm2 .The study suggested improvement on the selection of materials and

Sep 09, 2020· The compressive strength of the concrete cube test provides an idea about the characteristics of concrete. By this compressive strength test judge that whether concreting has been done properly or not. Concrete compressive strength for general construction varies from 15 MPa to 30 MPa and higher in commercial and industrial structures.

compressive strength of sandcrete blocks, have been investigated [2]. The impact of vibration time on the compressive strength of hardened sandcrete building blocks has also been assessed [3]. The sole objective of this paper is to show how steel chips (a waste industrial product from mechanical

The compressive strength is calculated from the failure load divided by the cross-sectional area resisting the load and reported in units of pound-force per square inch (psi) in US Customary units or megapascals (MPa) in SI units. Concrete compressive strength requirements can vary from 2500 psi (17 MPa) for residential concrete to 4000 psi (28 ...

The compressive strength of the sandcrete blocks is below standard recommended by Nigerian Industrial Standa (NIS) 87: 2000. The compressive strength of individual blocks was between 0.11 N/mm2 and 0.75 N/mm2 and the average compressive strength of the blocks were between 0.14

Jan 01, 2021· The compressive strength of concrete ranges from 15 MPa (2200 psi) to 30 MPa (4400 psi) for residential concrete and is high in commercial structures. Some applications use forces greater than 10,000 psi (70 MPa). PROCEDURE FOR TESTING THE COMPRESSIVE STRENGTH OF CONCRETE CUBES . Purpose of the test to To find compressive strength value of the ...

The rate of loading is 0.6 ± 0.2 N/mm 2 /s. Record the maximum force from the machine. The same procedure is followed in the testing of concrete cylinders also. Compressive strength can be calculated from the following equation. Compressive Strength = Applied Maximum Load / …

Adebakin et al. reported that after 28 curing days, the control ( sand) sandcrete blocks had compressive strength of 4.26 N/mm 2, while compressive strength of 1.80 N/mm 2 …

higher than the minimum compressive strength of sandcrete block by NIS 87:2007 ranging from 2.5N/mm² to 3.45N/mm² and. Therefore, on the basis of the compressive strength, sandcrete with laterite as part of the fine aggregate could be suitable for construction as load bearing blocks provided a

Sandcrete is composed of aggregates embedded in a cement matrix which fill the space between the aggregates and bind them together. This project investigated the compressive strength of segmental ...

the compressive strength of the blocks was determined on the 7th, 14th, 21st, 28th days respectively. 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.