A kind of low-temperature concrete applied to LNG storage tank construction and preparation method thereof
A concrete, low-temperature technology, applied in the field of material concrete, can solve the problems of concrete performance degradation, inability to meet the low temperature storage of liquefied natural gas, etc., and achieve the effects of excellent mechanical properties and good durability.
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Embodiment 1
[0056] S1: Equipped with various raw materials that meet the above quality requirements. The specific proportions are cement (35 parts), low-calcium fly ash (35 parts), mineral powder (65 parts), silica fume (10 parts), and river sand according to the weight ratio. (200 parts), steel fiber (6 parts), water reducing agent (1 part), water (40 parts) preparation;
[0057] S2: The preparation of mortar, mix cement, fly ash, mineral powder, silica fume according to the weight ratio to form a cementitious material, then pour the cementitious material and river sand into the mixer according to the weight ratio, add water and reducer according to the weight ratio Mix the water-based mixture until it forms;
[0058] S3: After the mortar is mixed and shaped, add steel fibers that meet the weight ratio and mix evenly;
[0059] S4: The prepared concrete mixture is filled into the mold, demoulded after 1 day, and cured under standard curing conditions (20±2°C, 95% relative humidity) for 2...
Embodiment 2
[0062] S1: Equipped with various raw materials that meet the above quality requirements. The specific proportions are cement (40 parts), low calcium fly ash (37 parts), mineral powder (70 parts), silica fume (14 parts), and river sand according to the weight ratio. (240 parts), steel fiber (9 parts), water reducing agent (1 part), water (45 parts) preparation;
[0063] S2: The preparation of mortar, mix cement, fly ash, mineral powder, silica fume according to the weight ratio to form a cementitious material, then pour the cementitious material and river sand into the mixer according to the weight ratio, add water and reducer according to the weight ratio Mix the water-based mixture until it forms;
[0064] S3: After the mortar is mixed and shaped, add steel fibers that meet the weight ratio and mix evenly;
[0065] S4: The prepared concrete mixture is filled into the mold, demoulded after 1 day, and cured under standard curing conditions (20±2°C, 95% relative humidity) for 2...
Embodiment 3
[0068] S1: equipped with various raw materials that meet the above quality requirements, the specific proportions are cement (45 parts), low calcium fly ash (40 parts), mineral powder (75 parts), silica fume (18 parts), river sand according to the weight ratio (280 parts), steel fiber (13 parts), water reducing agent (2 parts), water (50 parts) preparation;
[0069] S2: The preparation of mortar, mix cement, fly ash, mineral powder, silica fume according to the weight ratio to form a cementitious material, then pour the cementitious material and river sand into the mixer according to the weight ratio, add water and reducer according to the weight ratio Mix the water-based mixture until it forms;
[0070] S3: After the mortar is mixed and shaped, add steel fibers that meet the weight ratio and mix evenly;
[0071] S4: The prepared concrete mixture is filled into the mold, demoulded after 1 day, and cured under standard curing conditions (20±2°C, 95% relative humidity) for 28 d...
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