Anti-corrosion concrete applied to sulfate bittern environment as well as preparation and construction technology thereof

[0029] Reinforced concrete prefabricated piles are used in a sulfate-brine environment area to enhance the bearing capacity of the foundation. The designed piles are 8m long and 50cm×50cm in cross-section. GFRP bars are used as concrete bars and manufactured in a precast factory. According to the engineering survey report, the depth of stable water level: 2m, the salt content of saline soil: 37.42%, the content of main ions: Ca 2+ : 0.09%, Mg 2+ : 1.54%, K + and Na + : 17.08%, SO 4 2- : 18.09%, Cl - : 0.59%, HCO 3 - : 0.03%; the salinity of brine is 386.8g / L, and the salinity range of main ions in brine is (g / L): K + and Na + : 150.28, Ca 2+ : 0.84, Mg 2+ : 42.28, Cl - : 2.81, SO 4 2- : 190.51, HCO 3 - : 0.08. According to the salt content of saline soil, the salinity of brine, and the type and concentration of salt in saline soil and brine, prepare concrete according to the weight parts of the following raw materials:

[0030] Lightly burned magnesia powder:

[0034] Concrete according to the present invention is used in highway culvert construction in a sulfuric acid saline soil area, and stainless steel is used as reinforcement material. According to the engineering survey report, the salt content of the saline soil in this area is: 15.32%, and the main ion content is: Ca 2+ : 1.27%, Mg 2+ : 0.28%, K + and Na + : 6.11%, SO 4 2- : 6.49%, Cl - : 0.75%, HCO 3 - : 0.30%, CO 3 2- : 0.12%; according to the salt content of saline soil and the type and concentration of salt in saline soil, prepare concrete according to the weight parts of the following raw materials:

[0035] Lightly burned magnesia powder: 250 parts; magnesium sulfate: 35 parts; coarse aggregate: 300 parts; fine aggregate: 250 parts; water: 120 parts; citric acid: 5 parts; sodium citrate: 5 parts; oxalic acid: 5 parts Sodium silicate: 5 parts; Acetic acid: 3 parts; Acrylic acid emulsion: 5 parts; Fly ash: 30 parts; Ground slag: 30 parts; Calcined coal gangue powde

[0038] To build a brine pool in a saline soil area, use the concrete construction of the present invention, the salt content of saline soil: 46.9%, the content of the main ion is: Ca 2+ : 4.26%, Mg 2+ : 1.54%, K + and Na + : 22.05%, SO 4 2- : 23.05%, Cl - : 4.72%, HCO 3 - : 0.96%, CO 3 2- : 0.27%; the salinity of brine is 494g / L, and the salinity range of main ions in brine is (g / L): K + and Na + : 143.71, Ca 2+ : 28.77, Mg 2+ : 42.28, Cl - : 35.92, SO 4 2- : 242.86, HCO 3 - : 0.26, CO 3 2- : 0.2. According to the salt content of saline soil, the salinity of brine, and the type and concentration of salt in saline soil and brine, prepare concrete according to the weight parts of the following raw materials:

[0039] Lightly burned magnesia powder: 600 parts; magnesium sulfate: 200 parts; coarse aggregate: 1500 parts; fine aggregate: 1000 parts; water: 350 parts; citric acid: 10 parts; ammonium citrate: 3 parts; dihydrogen phosphate Ammonium: 5 parts; Sodiu