QUALITY OF SANDCRETE HOLLOW BLOCKS IN KADUNA STATE
QUALITY OF SANDCRETE HOLLOW BLOCKS IN KADUNA STATE
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Date
1993-06
Authors
DANUSO, OLAYINKA RASHEED
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Abstract
A study of the properties of sandcrete hollow block 1s important
since they are widely used in the construction industry. An understanding
of these properties is essential if blocks are to be used effectively.,
These properties have an important bearing on the appropriate application
of the products and on the precautions to be taken to ensure their
satisfactory behavior in service.
In this thesis, attempt have been made to present the current
practices involved in the manufacture of sandcrete hollow blocks in Kaduna
State. Various visits to various block industries were made and samples
were taken from five industries that are fairly scattered in their
location within the state.
Tests including dry development strength, wet compressive strength,
wet development strength, drying shrinkage, moisture movement, density
etc. were performed on the samples.
The work further points out the relationship between the wet
development strengths at various soaking ages and the dry development
strength at 28 days.
From the results, one observe that the 20 -- days development
strength of industries A,B,C.D and E are 0.08N/mm2, 1.02N/mm2, 0.9N/mm2,
0.77N/mm2 and 0.91N/mm2 respectively. The block samples attained fairly
steady strength from the 7th day of curing up till the 28th day.
Also the block samples attained a critical condition within 24 hours
of immersion prior to testing for wet development strength. The average
wet compressive strength of industries A,B,C,D and E are 0.47N/mm2,
0,584N/mm2, 0.550N/mm2, 0.501N/mm2 and 0.547N/mm2 respectively. While the
average density of the block samples is 994Kg/mm3. These values however
do not satisfy the relevant standards.
Description
A THESIS SUBMITTED TO HIE POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS
FOR THE DEGREE OF MASTER OF SCIENCE IN
(STRUCTURAL ENGINEERING)
DEPARTMENT OF CIVIL ENGINEERING
FACULTY OF ENGINEERING
AHMADU BELLO UNIVERSITY, ZARIA
JUNE, 1993
Keywords
QUALITY,, SANDCRETE,, HOLLOW,, BLOCKS,, KADUNA STATE