Acrylic polymer concrete compositions

An acrylic polymer concrete composition comprising an essentially anhydrous slurry of

• (1) an inert inorganic particulate or granular aggregate material having a void fraction of less than 0.37;
• in admixture with
• (2) from about 10% to 35% by weight, based on the amount of aggregate material, of a non-volatile binder monomer system comprising
• (a) from about 25% to 75% by weight, based on total of monomers, of at least one dicyclopentenyloxyalkyl ester of a polymerizable .alpha.,.beta.-unsaturated monocarboxylic acid selected from methacrylic acid or acrylic acid, the dicyclopentenyloxyalkyl ester being represented by the formula ##STR3## wherein R is CH.sub.3 or H, and R.sup.1 is selected from
• (i) alkylene groups having 2 to 6 carbon atoms and
• (ii) oxaalkylene groups having 4 to 6 carbon atoms and having one or more oxygen atoms joining distinct segments of the alkylene chain, each segment having at least 2 carbon atoms, and
• (b) from about 75% to 25% by weight, based on total of monomers, of at least one hydroxyalkyl methacrylate represented by the formula ##STR4## wherein R.sup.2 is a straight or branched chain (C.sub.1 -C.sub.6) alkyl group or a (C.sub.3 -C.sub.6) cycloalkyl group, the total of monomers being 100%;
• and
• (3) a polymerization catalyst selected from
• (a) about 0.1% to 3% by weight, based on total of monomers, of a (C.sub.3 -C.sub.18) hydrocarbyl peroxide with about 0.1% to 5% by weight, based on total of monomers, of an aromatic amine polymerization accelerator, or
• (b) about 0.1% to 3% by weight, based on total of monomers, of a (C.sub.3 -C.sub.18) hydrocarbyl hydroperoxide with about 0.0005% to 2% by weight, based on total of monomers, of a polyvalent metal salt or complex,
• (c) mixtures of (a) and 0.0005% to 2% by weight, based on total amount of monomers, of a polyvalent metal salt or complex, or
• (d) mixtures of (a) and (b).