5 amorphous silica u2014 0 5 to 5 with a preferred range of 1 5 to 3 when used the silica based filler can be any finely divided form of crystalline silica less than 100 microns in size silica flour is suitably used as a filler and is suitably present in a range of 0 to 10 by weight and preferably in the range of 0 to 5 it is noted that the fine glass aggregate used in the composition is suitably a 12 mesh glass aggregate but is not limited to this size generally fine aggregate is considered to have a size finer than a no 4 screen 4 75 mm the fine aggregate should not have fines less than about 150 microns 100 mesh which can be screened out laboratory scale compositional studies of the composition of the invention were made and selected formulas were used to produce 9 u2032 u00d7 5 u2032 u00d7 3 cm thick panels the mixing and forming procedure was different for samples and panels to a base composition of opc type i glass sand 12 mesh plate glass glass aggregate u215d u2033 minus cobalt blue vodka bottles and pozzolans were added to mix water that contained adva 100 a high range water reducer hrwr manufactured by w r grace for laboratory scale samples the cement and pozzolans were pre mixed for several minutes a portion of the mixing water and hrwr.