of 1150 u00b0 c was held for 15 minutes to sinter the industrial precursor into the resulting construction material the temperature was then decreased to 600 u00b0 c at a speed of 60 u00b0 c minute and then slowly decreased to 120 u00b0 c at a speed of 1 2 u00b0 c minute the temperature was then decreased down to ambient temperature to form the finished construction material the construction material exhibited a minimum of bubbles and pores on its outer surface production of an industrial precursor and construction material using methylcellulose as a plasticizer a finely ground powder of clear window glass 97 kg with a particle size less than 1 mm was mixed with 3 kg methylcellulose for 15 minutes at 25 u00b0 c and homogenized in a rotary dry wet mixer model sm 35 vet svida czech republic water was then added into the mixer in an amount of 20 by weight of the mixture and the mixture further homogenized for 5 minutes until a plastic like mixture was obtained the mixture was then extruded to thin rods via a blend extruder slv 110 vet svida czech republic at a temperature of 35 u00b0 c at a speed of 300 kg hour the rods were then dried to constant mass on a continuous belt dryer model kps 500 vet svida czech republic at 130 u00b0 c with an air humidity of 40 at.