Methyl methacrylate polymer concrete

Methyl methacrylate impregnated concrete-polymer specimens subjected to creep tests exhibited expansion under sustained load (negative creep), in contrast to contraction in length (positive creep) shown by ordinary concrete. If confirmed, this property could influence significantly the design of concrete-polymer structural and prefabricated members. 

Figure 11.11. Compressive stress-strain curves for concrete impregnated with poly(methyl methacrylate). Polymer loading MMAl > MMA2 > MM A3. Specimen L25 is a latex-modified concrete. (Dahl-Jorgensen and Chen, 1973.)...

Bis [[[4-(ethenyloxy) methyl] cyclohexyl] methyl] terephthalate 1,4-Cyclohexanedicarboxylic acid Dicyclopentenyl acrylate Dicyclopentenyl methacrylate Dimethyl maleate 2-Hydroxyethylethylene urea Hydroxypropyl methacrylate Jsooctyl acrylate 2-Phenoxyethyl methacrylate 3-[(Prop-1-en-2-yl) phenyl] prop-2-yl isocyanate N-Vinyl formamide monomer, concrete impregnation Methyl methacrylate monomer, concrete resurfacing Dicyclopentenyl methacrylate monomer, conductive polymers... 

Polymer concretes based on phenol-formaldehyde, acetone-formaldehyde resins and monomers, and methyl methacrylate are much less common. Phenolic resins are similar to furan in many physical and mechanical properties. However, they are unstable in alkalis like polyester resins [7],... 

Figure 11.13. Polymer-impregnated concrete compressive stress-strain curves as a function of polymer composition (hydraulic tester) KSI = psi X 10". MMA and BA refer to methyl methacrylate and n-butyl acrylate, respectively. (Manson et al, 1973.)...

One factor which is somewhat adversely affected by the presence of polymer is the coefficient of expansion, which has been shown to be increased about 25 % by the presence of 6 wt % poly(methyl methacrylate) or polystyrene in concrete (Steinberg et a/., 1968). This phenomenon is a consequence of the polymer exhibiting a larger coefficient of expansion than the cement. Slight 5 %) increases in thermal diffusivity and slight decreases in thermal conductivity were also noted (Steinberg et ai, 1968). 

---