广东省台山养路养路工区不用钢筋、不用木材、不用砖石、不用水泥,修建了一座“四不用”涵洞,使用效果很好。用料:“四不用”涵洞是用粘土、砂和石灰三合土修成的,初步设计为1:1:3,夯实以后每立公方体积中,用干石灰124公斤,红泥(代粘土)0.98立公方 There is no need to use steel bars, no wood, no masonry, no cement, and a “four no” culvert, which works well in Taishan, Guangdong Province. Material: “four no” Culvert is made of clay, sand and lime triptych, the initial design of 1: 1: 3, compacted later each square, with dry lime 124 kg, red mud (clay) 0.98立 公方