If grc was shaped by injection, glass fiber chopped yarn will be fine; if it was shaped by hands, alkali resistant fiber glass with mesh of 1cm * 1cm will be fine.
the content of ZrO2 in alkali resistant glass fibre whcih was used as reinforced material for portland cement is not less than 16. According to specific provisions in the T841, it is clearly required that alkali-resistant glass fiber must be used in GRC with its type incledes twistless roving.
