Summary of the invention
Based on the present immature property of domestic prescription for the gravity placement mortar; The applicant is devoted to research and develop the superstrength high flowability gravity placement mortar of stable in properties; Fully satisfy each item performance index of " Beijing-Shanghai High-Speed Railway sound/wind barrier is with the provisional technical requirements of gravity placement mortar ", and realize the rank of premium grads.Make the gravity placement mortar have controlled, good flowing properties time of coagulation, high, the characteristics such as anti-fatigue performance is good, operable time is long, convenient and quick construction of early strength; Can be widely used in motorway, high-speed railway sound/wind barrier with aspects such as the anchoring of gravity placement mortar, electrified Structural Engineering, anchoring that the mast base steel plate is installed filling, heavy mechanical equipment foundation grouting, wall screw and reinforcing bar and concrete structure reinforcement, and replace existing backward products gradually.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of gravity placement mortar, and this mortar is composed of the following components by weight percentage: aluminosulfate cement 40% ~ 60%; Water reducer 0.05% ~ 1%; Retardant 0.01% ~ 0.1%, hardening accelerator 0.005% ~ 0.05%, stablizer 0.001% ~ 0.01%; Skimmer 0.01% ~ 0.1%%, surplus are aggregate.
Above-mentioned aluminosulfate cement is a strength grade more than or equal to 42.5 aluminosulfate cement.
Above-mentioned aggregate is formed by following raw materials mix by mass percentage: the haydite 20%-30% of particle diameter 0.5-3mm, 30-80 purpose silica sand 25%-40%, the river sand 30%-45% of fineness modulus 0.65-1.
Above-mentioned water reducer is selected from one or more in naphthalene series high-efficiency water-reducing agent, sulfamate water reducer and the polycarboxylate water-reducer.
Above-mentioned retardant is selected from one or more of Hydrocerol A, boric acid, Sunmorl N 60S, phosphoric acid salt and tartrate.
Above-mentioned hardening accelerator is selected from one or more in lime carbonate, Quilonum Retard, calcium formiate and the lime acetate.
The aforementioned stable agent is selected from one or more in ether of cellulose, starch and the redispersable latex powder.
Above-mentioned skimmer is selected from one or both in plain type of fluorine, the silicon defoamer.
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
The present invention: 1. through screening, effectively improved mortar strength, and later strength continues to increase to cement raw material.2. through the screening of water reducer, improve degree of mobilization, reduced water consumption about 20%, effectively prevented the mortar shrinkage cracking.3. the rigid material that passes through to add multiple specific form structure and specific grating effectively improves mortar degree of mobilization and intensity as mortar aggregate.3. through research, realized the controllability of mortar time of coagulation and early strength to retardant, hardening accelerator.Through above measure, gravity placement mortar each item performance index of the present invention all can satisfy " Beijing-Shanghai High-Speed Railway sound/wind barrier is with the provisional technical requirements of gravity placement mortar " simultaneously, and have significant advantage aspect degree of mobilization retention value and the later stage ultimate compression strength.See table 1 with the detected result contrast of the product of existing manufacturer production:
Table 1 the present invention and existing producer product each item performance index detected result contrast table.
Beneficial effect of the present invention is: technology is simple, has characteristics such as superstrength and high flowability.
Embodiment
Below we will combine specific embodiment that the present invention is done further explanation.
Embodiment 1
Prescription:
Strength grade is 42.5 aluminosulfate cement 400kg, and naphthalene water reducer is selected HZ-7 naphthalene series high-efficiency water-reducing agent (being produced by Sichuan Heng Ze building materials ltd) 0. 5kg, Hydrocerol A 0. 1kg for use; Calcium formiate 0.05kg; Starch 0. 01kg, plain defoamer 0. 1kg of fluorine, aggregate 599.24kg (the haydite 178.12kg of particle diameter 0.5-3mm wherein; 30-80 purpose silica sand 182.12kg, the river sand 239kg of fineness modulus 0.65-1).
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
Embodiment 2
Prescription:
Strength grade is 42.5 aluminosulfate cement 500kg, and sulfamate water reducer is selected HZ-3 sulfamate high-effective water-reducing agent (being produced by Sichuan Heng Ze building materials ltd) 5kg, Hydrocerol A 0. 5kg for use; Calcium formiate 0.25kg; Starch 0. 05kg, silicon defoamer (YSR 3286) 0.5kg, aggregate 493.7kg (the haydite 146.35kg of particle diameter 0.5-3mm wherein; 30-80 purpose silica sand 150.35kg, the river sand 197kg of fineness modulus 0.65-1).
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
Embodiment 3
Prescription:
Strength grade is 42.5 aluminosulfate cement 600kg, polycarboxylate water-reducer NT-201 (being produced by Suzhou Fuke New Construction Materials Co., Ltd) 10kg, Hydrocerol A 1kg; Calcium formiate 0.5kg; Starch 0. 1kg, the plain defoamer 1kg of fluorine, aggregate 387.4kg (the haydite 115kg of particle diameter 0.5-3mm wherein; 30-80 purpose silica sand 117.4kg, the river sand 155kg of fineness modulus 0.65-1).
During construction, said product is added the water stirring can use (weight ratio 0.16 of water and this product dry-mix) for slurry.
The present invention chooses the prescription of real embodiment 2, and its product has been done each item performance index detected, and sees table 2 for details.
Table 2 embodiment 2 product each item performance index detect table.