American national standard specifications for modified epoxy emulsion mortar/grout A118.8 — 1999

This specification describes the test methods and the minimum requirements for modified epoxy emulsion mortar/grout. The chemical and solvent resistance of these mortars/grouts tends to be better than for organic adhesives, on a par with latex-Portland cement mortars, but not designed to meet the requirements for ANSI A108.6 and ANSI A118.3.

Requirement of ANSI 118.8 - Tests for application properties:

J-5.1 Water cleanability: Not less than 40 minutes
J-5.2 Initial set: Not less than 3 hours nor more than 7 hours. (By Gilmore Needles (ASTM C266) using mortar as prepared in J-4.1.)
J-5.3 Final set: Not less than 9 hours nor more than 16 hours.
J-5.4 Bond strength to quarry tile - Requirement: Average shear bond strength to quarry tile shall be greater than 300 psi (21 kg/cm2)
J-5.5 Shear strength of mortars to glazed wall tile:
    7-day shear strength: greater than 200 psi (14 kg/cm2).
    7-day water immersion shear strength: greater than 150 psi (10.5 kg/cm2).
    4-week shear strength: greater than 250 psi (17.4 kg/cm2).
    12-week shear strength: greater than 250 psi (17.4 kg/cm2).
J-5.6 Shear strength of mortars to impervious ceramic mosaic tile
    7-day shear strength: greater than 150 psi (10.5 kg/cm2).
    7-day water immersion shear strength: greater than 100 psi (7 kg/cm2).
    4-week shear strength: greater than 150 psi (10.5 kg/cm2).
    12-week shear strength: greater than 150 psi (10.5 kg/cm2).
J-5.8 Comprehensive strength of the cured material: Greater than 2600 psi (183 kg/cm2).
J-5.9 Tensile strength of the cured material: Greater than 300 psi (21 kg/cm2).
J-5.10 Flexural strength Requirement:
    Modulus of rupture greater than 850 psi (60 kg/cm2).
    Modulus of elasticity not greater than 1.5 x 10^6 psi (1.1 x 10^5 kg/cm2).
J-5.12 Water absorption: 

    50 percent relative humidity to immersion – less than 5.0%
    Immersion to dry – less than 7.0%

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