Question $7(10\%)$

The $5-$hr boiling test was performed on a medium weathering clay brick according to ASTM C$67$ and produced the following masses:

Dry mass of specimen $=1\mathrm{.}788kg$

Saturated mass after $5-$hr submersion in boiling water $=2\mathrm{.}262kg$

Calculate percent absorption by $5-$hr boiling and check whether the brick satisfies the ASTM requirements.

Table $1$ Physical Requirements for Clay Building Bricks $($ASTM C$62)$

$\backslash$table$[[,\backslash$table$[[$Min$.$ Compressive$],[$Strength$,$ Gross Area,$],[$MPa $($psi$)]],\backslash$table$[[$Max$.$ Water Absorption$],[$by $5-$hr Boiling, $\%]],\backslash$table$[[$Max$.$ Saturation$],[$Coefficient$]],,],[$Grade$,\backslash$table$[[$Average of$],[$Five Bricks$]],$Individual,$\backslash$table$[[$Average of$],[$Five Bricks$]],$Individual,$\backslash$table$[[$Average of$],[$Five Bricks$]],$Individual$],[$SW ${?}^1,20\mathrm{.}7(3000),17\mathrm{.}2(2500),17\mathrm{.}0,20\mathrm{.}0,0\mathrm{.}78,0\mathrm{.}80],[M{W}^2,17\mathrm{.}2(2500),15\mathrm{.}2(2200),22\mathrm{.}0,25\mathrm{.}0,0\mathrm{.}88,0\mathrm{.}90],[$NW ${?}^3,10\mathrm{.}3(1500),8\mathrm{.}6(1250),$No limit$,$No limit$,$No limit$,$No limit$]]$

${?}^1$ Severe weathering

${?}^2$ Moderate weathering

${?}^3$ Negligible weathering