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How do I know when to use hot weather concreteing techniques?
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If we fog spray flatwork to help prevent shrinkage cracking, is there any danger of increasing the water-cement ratio at the surface and reducing the strength of the concrete?
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Are joints in concrete meant to accommodate expansion or contraction? Someone told me that what I've always called expansion joints I should now call contraction joints. Does this mean that concrete doesn't expand? What are these joints actually supposed to do?
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Q: Can self-consolidating concrete be used for tilt-up panels? What does the finish look like, and are plastic shrinkage cracks a problem?
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The owner of a recently constructed manufacturing facility contacted us to help solve a problem with the concrete floor's surface.
I'm relatively new to the concrete polishing business. My company has been involved in treating stone and tile floors for years, and recently began to polish more concrete surfaces. Recently, we were asked to bid on a project that featured a concrete floo
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The contractor says it is a workmanship problem between me and the excavator. What are your thoughts on this and how should I go about repairing it? The contractor suggested pumping grout under the floor at the joints, but I don't think that is a good ide
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What is microcracking? As a small concrete contractor, should I be concerned about it?
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I am the building manager for a large church on the East Coast. We recently have contracted with a company to grind and overlay about 5000 square feet of our church.
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I am the building manager for a large church on the East Coast. We recently have contracted with a company to grind and overlay about 5000 square feet of our church.
Why does concrete discolor even though the specifications (wet cure) were followed without exception?
I am bidding on treating a concrete slab and one of the specified requirements is that there not be any birdbaths. The final surface will be flooded to see if this has been achieved. Do you have any suggestions?
We recently were called to apply an epoxy surface to a newly constructed 6-inch-thick warehouse slab with a tight 12x12-foot sawcut control joint pattern. Can you explain what may have caused these random cracks to develop?
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I have a project specification that requires fog spraying, followed by curing compound, followed by wet cure with burlap and soaker hoses. Why the complicated curing requirements? Isn't this a case of specification-overkill?
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We have had a number of slabs placed in our area lately that are experiencing severe surface cracking. Our finisher says it's the concrete's (and therefore the ready-mix producer's) fault. The ready-mix producer says it is a result of failure to follow appropriate cold-weather concreting...
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Although I've been lucky so far and have not had to deal with a failure of flooring materials applied over one of my slabs, it scares me to death thinking about it. What can I do to keep this problem from occurring?
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I was told that what we used to call expansion joints I should now call contraction joints. Does that mean that concrete doesn't expand?
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We are installing colored textured concrete in an enclosed mall being constructed in a winter climate. The general contractor is using temporary unvented construction heaters that put both the heat and the exhaust into the enclosure. When we came back the following day I noticed that some of the...
We've been asked to bid on a polishing project on a recently placed slab. The engineer had been concerned about controlling concrete drying shrinkage. He developed a concrete mix design optimization plan that resolved many of the problems that occur on industrial slabs on ground. The slab has...
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We are experiencing intermittent shrinkage cracking while placing extruded concrete curb. Generally the cracking occurs along the face of the curb and the presence of tight radii does not seem to make much difference. What can we do to stop this?