JTG / T F50-2011 "highway bridge construction specifications." Yoshida JT-C2 prestressed pipe grouting agent has served in the Railway Tenth Shanghai high-speed railway construction at the third, in cross two Air Bureau, cross Sanhang Bureau, China No.15 Metallurgical, China Railway 24 Bureau, the China Railway 25 Bureau, nuclear Northwest Engineering Construction Industry Corporation Beijing Branch, and other of its performance by the trust of customers. JT-C2 prestressed pipe grouting agent I. Features:? 1 mobility, the initial flow rate is less than 17s, no shrinkage, self-compacting, high strength, no bleeding, no stratification. 2. durability, based inorganic grout, no aging, no corrosion of steel, durable strong. 3. grouting have full early strength, micro-expansion properties. The product has high filling properties, grouting construction of one-time, non-porous dense slurry pipeline. 5. prestressing steel does not rust, strong bond with the concrete, rust rust, chlorine-free low-alkali, adhesion and high green. 6. Easy to use, Extension of TD-C2 pipeline grouting agent to 8 to 12% incorporation of ordinary cement mix made of micro-expansion grouting material can be used. Recommended dosage by 10%. Second, the technical indicators: Standard JTG / T F50-2011 "Technical Specifications for Construction of Highway Bridges" experiment Mixing Method: The experiment required speed of 2,000 rpm / min or more high speed mixer mixing, feed pipe grouting agent weighed 300g, 2700g cement , before adding 680g of water in mortar mixer in slow stirring for 2 minutes, after a high-speed mixer speed for 6 minutes, adding water 160g high speed for 3 minutes, and then you can test, if the scene was not a high speed mixer, you can choose stirred by a mortar mixer , but the flow rate will be extended. Specific steps with mortar mixer stirring as follows: Experimental procedure: Weigh pipeline grouting agent 300g, cement 2700g; add water 580g slowly stir 1min, then quickly stir 5min; add water 100g quick stir 3min; add water 160g slowly stir 1min;? Testing can be; Item Standard Index Test Value setting time (h) the initial setting and final setting ≤24 16 ≥5 6 fluidity (s) 10-17 15 30min initial fluidity fluidity fluidity 10-25 10-20 18 60min bleeding rate 22% 24h free bleeding rate 0 0 3h bleeding rate between the wire 00 compressive strength (Mpa) 3d ≥20 25 7d ≥40 43 28d ≥50 60 flexural strength (Mpa) 3d ≥5 6 7d ≥ (When the channel vertical height> 1.8m) 6 7.5 28d ≥10 11 pressure bleeding rate (%) 0.22Mpa (channel vertical height ≤1.8m when) ≤2.0 1.3 0.36Mpa free expansion% 3h 0-2 0.16 24h 0- 3 0.25 corrosive effect on steel without corrosion without corrosion Third, use: 1. tendons production, Anchorage, fixtures, installation, pre-stressing, grouting, etc. should meet the design requirements, in line with passenger dedicated prestressed Interim technical conditions specified precast concrete beams. 2. prestressed pipe grouting agent mixing grout reference cement ratio, the proposed 0.26-0.28, according to testing to determine actual water-cement ratio required. Added to the actual mixing water in a blender for 80% -90%, starting mixer, even entire pipeline grouting agent added, while adding while stirring, then added all the cement evenly. All powder was added slowly with stirring 2min, then with rapid stirring 1min, add the remaining 10% -20% of mixing water, stirring was continued for 1min. 3. The slurry was stirred to push into the bore from the duration, depending on the temperature conditions, are generally within the range 30-45min. The slurry pressure injection process before use and should be continuously stirred. Fourth, Cautions 1. grouting slurry temperature should be maintained at between 5 ℃ -30 ℃, or should take steps to meet the criteria. 2. prestressed pipe grouting agent, water weighing accuracy, and in strict accordance with the determined water-cement ratio, not free to adjust the amount of water. V., packaging and storage 1. The product is plastic woven (plus lining), net weight 25 kg / bag. 2. To be stored in dry and ventilated room. 3. The shelf life of six months.