一、用途及特點
本劑有一定的早強、減水、增強作用，屬自然養(yǎng)護型外加劑。本劑一般用于磚混結(jié)構(gòu)建筑物所用的混凝土。摻本劑的混凝土在常溫下成型5d后可以達到設(shè)計標(biāo)號的75%以上。使用摻加本劑的混凝土澆筑圈梁、構(gòu)造柱、陽臺、雨蓬等構(gòu)件強度增長較快，后期強度比不摻本劑的混凝土高。使用本劑既能縮短工期，又能保證工程質(zhì)量。本劑適用于常溫、低溫和正負溫度交替（日最低溫度不低于-5℃）環(huán)境中施工的有早強要求的普通混凝土、鋼筋混凝土和預(yù)應(yīng)力混凝土工程。
二、執(zhí)行標(biāo)準(zhǔn)：GB 8076－1997
三、用量與用法
1、摻量：水泥質(zhì)量的1.5%。每100kg水泥加本劑1小包（1.5kg）。
2、早強減水劑混凝土的攪拌和振搗方法，可與不摻外加劑的混凝土相同，粉劑加入攪拌機時，應(yīng)先與水泥、骨料干拌后再加水，攪拌時間不得少于3min。
3、采用自然養(yǎng)護時，應(yīng)用塑料薄膜覆蓋；低溫時，應(yīng)用保溫材料覆蓋。不能用于蒸養(yǎng)混凝土。
四、貯運及包裝
1、塑料袋小包裝每包1.5kg，編織袋集裝大包裝。
2、本劑為粉狀。搬運時嚴(yán)防破損。貯存時應(yīng)防潮。如有受潮結(jié)塊，應(yīng)粉碎并通過0.63mm的篩后方可使用。
3、貯存期：3年。
|
編號 |
摻量 % |
用水量 (g) |
塌落度(mm) |
減水率(%) |
抗壓強度（ MPa ） / 抗壓強度比（ % ） | |||
|
1d |
3d |
7d |
28d | |||||
|
0708 基準(zhǔn) |
—— |
2730 |
81 |
—— |
7.6 |
13.46 |
18.53 |
24.7 |
|
MNC-A 1 |
2.5 |
2100 |
79 |
23.1 |
26.29/345.9 |
35.07/260.5 |
39.74/214.5 |
45.92/185.9 |
|
MNC-A 3 |
2.0 |
2150 |
86 |
21.2 |
23.44/308.4 |
33.41/248.2 |
37.84/204.2 |
39.98/161.9 |
|
MNC-A 5 |
1.5 |
2270 |
76 |
16.8 |
16.3/214.6 |
25.89/192.3 |
29.69/160.2 |
35.23/142.6 |
A5早強減水劑是以 β- 萘磺酸鹽甲醛縮合物為主要成份，并復(fù)合有增強組份的高效早強減水劑，它具有對水泥品種適應(yīng)性好，引氣量少等特點，減水增強效果顯著，早強作用尤為明顯，能提高混凝土抗凍性、抗?jié)B性和耐久性。產(chǎn)品符合混凝土外加劑國家標(biāo)準(zhǔn)。
用途及摻量：
A5早強減水劑對鋼筋無銹蝕作用，無毒、無污染，可應(yīng)用于公路、橋染、港口碼頭，工業(yè)及民用建筑的鋼筋混凝土或預(yù)應(yīng)力混凝土結(jié)構(gòu)，蒸養(yǎng)及自然養(yǎng)護的預(yù)制構(gòu)件等，也可用于氣溫不低于 - 5 ℃ 時的冬期施工。它的推薦量為水泥重量的 1.5% ，減水率 15% ， 3d 強度提高 100% ， 7d 強度提高 70% ， 28d 強度提高 40% ，混凝土坍落度可提高 2 ～ 3 倍，或節(jié)約水泥 10 ～ 15% 。
使用方法：
1 、高效早強減水劑為粉劑，使用時，可直接與水泥集料一起投入攪拌機進行攪拌。
2 、產(chǎn)品應(yīng)存放于干燥處，若產(chǎn)品受潮結(jié)塊，應(yīng)用水化開后使用。
Early-strengthening Water-reducing Agent
A5 High-efficiency, early-strengthening. Water-reducing agent has, for its main ingredient, β-naphthalenesulfonis acidformaldehyde high condensate, which is compounded with the high-efficiency, early-strengthening, water-reducing agent that strengthens the cementitious composition. It is adaptable to all types of cement. With little air induced; its water reduction and gain in strength are remarkable, especially, its early strength is very notable. It can raise the resistance to frosting and seeping, and it can last longer, the product has been manufactured in compliance with relevant national standards for additives.
Use & Dosage:
A5 High-efficiency, early-strengthening water-reducing agent produces no corrosive effect on steel reinforcements, being non toxic, and non polluting. It can be used for making structures of reinforced concrete or pre stressed concrete, prefabricated members requiring steam curing or natural curing, for constructions of highways, docks at harbours, industrial and civil buildings; it is also suitable for winter constructions at a temperature not below -5 ℃ .It is recommended that the quantity of the agent to be added should be1.5% relative to the weight of cement used, its ratio of water reduction being 15%,its 3-day strength ca be raised by 100%. Its 7-day strength by 70%,and its 28-day strength by 40%.slump can be raised by 2 ～ 3times, or10 ～ 15% of cement can be saved.
Application:
1 、 A5 High-efficiency, early-strengthening, waterrdeucing agent is a powder preparation; when using, it can be put into the mixer together with the cement aggregates for mixing;
2 、 The product should be stored at a dry place; in case coagulums have been formed due to moisture, it must be first dissolved in water before use.
