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Concrete highways have frequently been criticized because of the repetitive "thump" caused by crossing transverse joints. Has any thought ever been given to staggering these joints in lanes so that a vehicle rides with each set of wheels passing over the joints alternately? Surely at average speeds...
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Are plastic resins being used as grout? If so, isn't this a terribly expensive practice?
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What do you suggest as the safest, non-slip surface for school paving? Indentations don't really do a good job and are not attractive; exposed aggregate is rough on children's knees.
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What is plastic cracking in concrete?
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Etching with acid followed by a neutralizing rinse is, we all know, an accepted method of cleaning a concrete wall surface. But what if the surface is indoors? I am thinking in terms of an exposed-aggregate panel in a block wall over a parquet floor. I know this should have been done before the...
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This may sound simple, but what makes white cement white?
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Natural rock is expensive in our region, and I am faced with the problem of providing an old-fashioned rock garden. Is there an easy way of casting "rocks" to look as natural as possible? It occurred to me that this might be a good way of getting rid of batch ends, and discard concrete.
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We have a project where steel beams of varying lengths have to be embedded in concrete. Should these beams be given any special treatment?
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What's a good way of roughening the under surface of tilt-up slabs to take a plaster finish?
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Manufacturers' instructions for applying plastic paints to masonry always seem to emphasize the need for a dry surface and dry weather. Just how important is this?
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I am thinking of using wood chips and shavings to make a lightweight mix. The obvious danger here is that it can burn; is there an easy way of overcoming this?
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What is the distinction between air bubbles which are regarded as voids and those which are considered to be entrained air?
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What special curing requirements should be established for concrete surfaces which will be exposed to severe wear?
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There seems to be wide agreement that even air-entrained concrete will scale if salt or other de-icing agents are applied in the first year. How, then, can new pavements, such as driveways, parking aprons and garage floors, be protected from the inevitable automobile drippings?
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If evaporation can be prevented by some type of membrane curing material, how much water must concrete contain for adequate curing?
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Is there a rule of thumb that can be used for estimating the amount of cement or concrete that will be required in the building of a stated number of houses?
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An article in an engineering magazine states that muriatic acid may be used for the removal of grease from concrete. What is your recommendation on this?
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What is the function of an absorption blanket in the construction of a granolithic concrete floor?
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How sharply can plywood panels be bent in forming curved concrete surfaces?
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How much does it cost to operate an effective snow melting system?
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In the absence of specific instructions, what would be a safe set of rules to follow in respect to the amount of cover to provide for reinforcing steel?
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We hear a lot of generalities about concrete bids running substantially less than steel bids. Do you have any specific figures for an actual project?
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What is the completed contract basis method of accounting and why is it sometimes used?
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When ready mixed concrete trucks are delayed in transit or on the job site, what effect will the additional time of mixing have on the slump of the concrete?
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