What is Alkali-Aggregate Reaction (AAR). Alkali-aggregate reaction (AAR) is a chemical reaction between the alkali in Portland cement and reactive minerals in aggregate and additives that takes place when moisture is present.herefore with aggregates falling in deleterious zone, Use of low alkali cement is recommended to prevent any chances of ASR occurrence. 1  Alkali-silica, a reaction between the alkali hydroxides in concrete and reactive forms of silica in aggregate (e.g., chert, quartzite, opal, strained quartz crystals); 2  Alkali-silicate, a reaction between the ....
For solid hardwood flooring, both unfinished and prefinished, acclimation is a must. The same thing for laminate flooring. Keep it in the house for at least 48 hours prior to installation. The negative effects of not acclimating your hardwood floors before installation can be either buckling or gaps between the boards.
there are solid and engineered woods and there are also site finished and pre finished options too for this discussion we will consider the materials and costs for the installation of a prefinished hardwood floor in the average 250 square foot living roomthis pricing will assume that the owner will want to keep costs low and will not cover such costs asor the living room project this translates to a total cost of $ 2063 if this installation were a diy project it is safe to assume a $ 4 to $ 6 price per square foot or $ 1250 for the materials additional materials costs might include an insulating underlay glue or adhesive and any recommended cleansers or sealants