Defense manufacturing is all about project manufacturing and project accounting.
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Dick Engineer and international traveler interested in construction techniques, problems and proper design. Unless you have a very small application, it is much more practical and economical to use higher strength block, since doubling the strength is very possible. WexlerĮxcessive grout strengths in prisms could result in the fibers with the highest stress to be lower than the average prism strength. Grout should not be used to increase the vertical strength of a wall, but is intended to transfers loads between the masonry units and the reinforcement if needed. In masonry, the grout strength is not that important, since its purpose is to transfer the loads from the wall into the reinforcement usually and the grout strength should be approximately the strength of the net unit strength. Keep in mind that gout is one component in a structural element the wall and is not like a test of delivered concrete in cylinders made from placed concrete that is the main building component.
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All of the current code standards are based on the grout testing method that have be used as documentation of the grout for decades of testing and research because it provides the most realistic measure of properties. Sampling and testing for compressive strength of any cementitious material should be done to check the mix design, not the in-place condition.īut nevertheless, it is accepted and promoted by the industry. Either specify the proportion method or the compressive strength method. You can accept that the prescribed proportions will achieve sufficient strength for the application or you can specify a compressive strength and use C for the testing. Does it matter what the cylinder breaks are, since the test is invalid? Tx, Structural Eng in Florida. Masonry grout is supposed to be tested based on ASTM C using a masonry block form to absorb water and simulate field conditions.īut how often is this done? The testing company usually takes cylinders of the grout and completes breaks. Promoting, selling, recruiting, coursework and thesis posting c forbidden.
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