Floors/flooring epoxy resin mortar

In recent years, more heavily filled flowing epoxy resin mortar flooring systems laid at 3 to 5 mm thickness are increasingly being used instead of the more traditional trowelled epoxy resin mortar flooring systems described below. The laying costs of the flowing mortars are... 

Another aspect of epoxy resin mortar floorings which needs careful attention is that their coefficients of thermal expansion are approximately three times that of concrete. This, coupled with the relative low thermal conductivity of epoxy mortar, can cause stresses to be induced at the resin mortar/concrete interface under conditions of thermal shock (e.g. thermal cleaning), resulting in break-up of the flooring due to initial failure in the concrete. Two approaches have been tried to overcome this problem ... 

Another important application of reactive resins is the production of resin-bonded screeds that, by virtue of their high mechanical and chemical stability, are used, for example, for industrial floors. One particular problem is the bonding of old concrete to new concrete, where peeling occurs because of the shrinkage of the new concrete layer. By applying intermediate layers of a suitable epoxy resin mortar, it is possible to establish permanent bonds with strengths greater than that of the concrete. 

Epoxy resin composites are well suited for applications in moist environments they are used as epoxy resin mortar, cold curing anchoring compound in building construction, repairs to bridge pavement, and high-quality floor coverings in industrial facilities. 

Of course, floors in a structure receive the greatest abuse, where deterioration occurs in such areas, epoxy resin systems have been widely used for repairs. Industrial floors are now constructed with initial specifications calling for an epoxy mortar, usually, 1/4 inch in thickness, to provide a diemically and physically resistant surface. Slip-resistant aggregates may be embedded in such epoxy toppings. The same tech-... 

Uses Hardener for epoxy resins in solv.-based paints (industrial and anticorrosion paints), solv.-free coatings, floor coatings, highly filled mortars for building trade, GRP, and encapsulating compds. for electronic components... 

Polyurethane mortar flooring systems based on somewhat similar technology to this special polyester system have also been used in chemical plants and have given excellent service. The basic urethane polymer is more elastomeric than either epoxy or polyester resins and, as such, is reported to have excellent thermal properties up... 

A red shale brick or quarry tile floor is usually installed over a hot or cold applied mastic membrane. The mastic is applied to the concrete floor then the brick or tile are set with a resin cement. The resin cement can be a furan, a polyester or an epoxy depending on the anticipated exposure conditions. If high temperatures and constant exposure to aggressive chemicals are anticipated, the brick or tile will be bedded in the mortar as well as having mortar joints. 

Epoxy mortars are less frequently used in CRM than other resin bonded systems due to higher cost, lower maximum service temperature, and narrower range of chemical resistance. However, because of their excellent bond strength to concrete, epoxides are frequently used for acid brick floors over concrete. They also have applications in alkali exposure. 

The urea - formaldehyde (UF) and melamine-formaldehyde systems represent similar hazards. Free formaldehyde, which can be present in trace amounts, may be liberated to the air when resins are processed or even slowly afterwards, which can irritate the mucous membranes. Formaldehyde is a metabolite occurring normally in the human body and is converted to formic acid by enzymic oxidation. Formaldehyde in the cured resin is believed to be due to the unreacted free formaldehyde left (there are also claims that it may be due to demethylolation reaction and/or cleavage of methylene-ether bridges as well). A model specification to set out the health hazards is presented for polymer mortar surfacings (out of epoxy, polyester and PU thermosets), intended for their use as indoor floor tappings [39]. 

Uses Diiuent for epoxy systems, for soiv.-free coatings and floorings Features General purpose low toxicity improves adhesion to most substrates incl. oily metal ( 5-10 phr) improves trowelability of epoxy mortars add to resin or curing agent Properties Gardner7 max. liq. sp.gr. 1.04 dens. 8.6 Ih/gal vise. 100cps... 

Chem. Desaip. Alkyl-atyl-modified methylpolysiloxane Uses Deaerating agent, flow aid, slip agent for solv.-based and solvent-less systems u in building protection (casting materials, mortars, floor coalings based on solventless and solv.-based epoxy and PU resins) Properties Sp.gr. 0.935-0.955 dens. 7.9 Ib/gal vise. 500-1000 mPa s ... 

Some of the earliest major applications of adhesives in civil engineering involved the use of resins for abrasion resistant and non-slip surfaces to heavy duty floors and roads. This was achieved by the use of synthetic anti-skid grits, such as calcined bauxite, set in a resin base. Both epoxy and polyester resins have been used, applied either by trowel or in slurry form by squeegee. Trowelled systems are usually heavily filled mortars with an aggregate resin ratio of the order of 6 1 and as such usually require a priming... 

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