Bridge bearing grouting material knowledge lecture

Bridge bearing grouting materials, grouting high-speed bearing bridge bearing grouting material is designed for railway, highway prefabricated beam and cast-in-place beam support device developed by a micro swelling cement base grouting material, the goods has a fast setting rapid hardening, super early strength, high strength, high flow, operation time is long, counter shorten and freeze resistance function. Commodity inductive function is superior, the operation is simple, to ensure full fill all space when grouting, and supply of appropriate swell stress block shortened, ensure that can reach the bearing strength (2 hours after grouting Compressive strength is greater than 20 mpa) , its function indicators in full compliance with the interim skills on passenger dedicated line bridge pot rubber bearing conditions '( The base of science and technology ( 2005] No. 101) Such as specification, TB/T3320 - Ball bearings of railway Bridges, TB/T2331-2013 2013 pot bearing of railway Bridges. One, product characteristics: 1, super early strength, high strength: 2 hours after grouting to the bearing strength, high strength after all, satisfied the request of the engineering design. 2, high elastic modulus, elastic modulus is greater than 30 gpa. 3, high flow, water consumption can be suitable for wide range adjustment water activity, without vibrating fill all the space. Activity 4, long operational time: goods can stick to more than 30 minutes, activity loss is small. 5, counter shorten: after grouting micro swell of counter shortened by itself, to ensure tight touch between bearing and foundation. 6, no corrosion effect: for steel, bolt, steel and other corrosion damage. 7, oil resistance, soaked in oil after 28 days strength, no lost. 8, frost resistance, promised to - Outdoor grouting under 15 ℃ temperature. Second, the scope of application: 1, high-speed railway, highway, pedestal grouting of passenger dedicated line, etc. 2, bridge bearing by anchor, trajectory, filling grouting. 3, railway bridge bearings fixed quickly, bridge expansion joint repair the way. 4, cast-in-place girder bridge pot rubber bearing grouting. Three, function index: according to the customer request of the concrete engineering, construction temperature is different, can adjust the coagulation time, strength and mobility. Project indicators of water % 151617 secrete water % 000 mm thickness of grouting 20 mm or greater mobility initial 310 or 330 or 35030 min or 280 or 300 or 320 or higher compressive strength, the Mpa ( 4×4×16cm) 2 h p 30 p 25 or greater acuity 45 or 50 or 403 d, 201 d 65 or 60 or higher or greater acuity 75 or 70 or 6556 d, 5528 d, 90 d does not reduce the flexural strength Mpa1d acuity 12 November 10 or more elastic modulus Gpa28d acuity or 32 28 d0 swell rate %. 02 ~ 0. 10 non-rust four effect on reinforcement rustily, construction way: 1, the underlying processing: remove floating dust, oil and other unfavorable to glue the sundry, construction should be the underlying energetic wet with water, 12 hours before grouting should ensure that the underlying MingShui. 2, before the grouting should be set template and check the sealing, avoid the course of grouting slurry, grouting quality. 3, the volume can choose forced mixer mixing: according to the introduction of water metering well water, mixing water specification for 15% 17%, to about three-quarters of the first water mixing 1 ~ 2 min, to participate in the remaining water continuous mixing evenly, all mixing time control within 5 min. A mixing volume shoulds not be too much to used up within 20 minutes advisable. 4, quantity is lesser, can choose the hand electric drill mixing: first the mixing water and about three-quarters of material into the barrel, mixing 1 min after add the remaining material mixing evenly, on the basis of the electric hand drill is not the same as the power and speed, all the mixing process needs about 5 ~ 10 min. 5, evenly mixing the grouting material if there are a lot of bubbles, appearance should let stand for 1 ~ 2 min, after waiting for air bubbles eliminate again for grouting. Five, the maintenance: 1, after the grouting, exterior touch dry, water moisturizing maintenance initial setting. 2, the winter maintenance should be immediately after the construction completion besmear brushs concrete maintenance beauty seam an agent, covering plastic film and build rock for thermal insulation quilt or grass grid and moist. Under the condition of different temperatures, maintenance time and ripping schedules: temperature ( ℃) Moment (dismantle h） Maintenance time ( d） - 10 ℃ ~ 0 ℃ 96140 ℃ 72105 ℃ ~ 5 ℃ ~ 15 ℃ 487 15 ℃ or higher 247 six, see the usage: CGM bridge bearing unit grouting material, dosage is about 2. 3 tons - 2. 5 tons per cubic meter. Seven, packing and storage: 1, this product retained, should pay attention to well protected against dampness, moisture, shelf life for six months. 2, this article selects the lining plastic composite paper-plastic bag packaging, 50 kg per bag + 0. 5 kg.