我厂专业提供十余个品种的特种水泥,包括:U型、S型超细水泥、GC灌浆材料、S型瞬凝水泥、BISO无收缩水泥、混凝土快速修补砂浆、L型混凝土快速修补剂等新品种

硫铝酸盐超早强水泥

硫铝酸盐超早强水泥
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主要用途:快速施工突击抢修抗渗堵漏修补构件

Fastspeedconstruction,emergencycapitalrepair,antiseepandleakingstoppageandrepairstructures

一、简介

超早强水泥具有:凝结时间快、早期强度高、微膨胀、负温性能好、抗硫酸盐侵蚀等优良特性。在适当选用减水剂(或缓凝剂)及水灰比条件下,能满足混凝土机械化施工要求,这种水泥力学强度超前发挥于早期,可以大大加速施工进度,对一些争分夺秒,抢时间的紧急工程尤为适应。同时,由于该水泥具有微膨胀特性,可用于配制补偿收缩混凝土,装配式钢筋混凝土构件板柱浆锚,管道与钻孔的封闭作业,认及隧道涵洞、地铁港口、公路桥梁、机场跑道和混凝土建筑物的加固修补等。

二、品质指标

1、细度:0.080mm方孔筛筛余不超过10%

2、凝结时间:

初凝:不小于5分钟:

终凝:不大于40分钟;

3、强度(按GB177进行,见下表)

三、使用注意事项

1、超早强水泥凝结块,配制砂浆或混凝土时,应在失去塑性以前用完。每批拌和数量要适量,随拌随用。搅拌地点要尽量靠近浇注现场,事先要充分准备,明确分工,操作要快,有条不紊。

2、如非突击性工程需要延长操作时间,为改善混凝土或砂浆的流动性,可掺加减水剂或缓凝剂,常用减水剂有SN-II,木质磺酸钙等,常用缓凝剂有酒石酸、柠檬酸等,其掺量由试验确定。

3、超早强水泥水灰比调幅较宽。当水灰比高时,虽然仍能固化,但将影响凝固时间,强度和膨胀性能正常发挥。因此,应根据具体性况确定合适的水灰比。

4、由于硫铝酸盐矿物水化速度快,加水后立即进行水化反应形成新的水化物,在混凝土或砂浆拌和时,要一次加水完毕,切忌中途加水。

5、超早强水泥加水拌后粘度较大,施工时须用机械振捣密实,防止构件出现峰窝与孔洞。

6、超早强水泥浇注的混凝土构件和水泥制品,应加强养护,浇注完毕后要立即覆盖润湿的草包之类吸水材料,保持构件外表湿润,养护24小时。即使已经启用,在1-3天内也需继续适当养护,防止烈日曝晒。

7、超早强水泥存放期为3个月,水泥仓库必须干燥,防止受潮。

I. Introduction
The super strong cement has fast condensation,high strength in early period,light expansion,good negative temperature feather,anti-sulfate erosion,etc.good characteristics.Under the condition of selecting water-reducing agcnt(or buffer)and water & dust proportion,it can be satisfied with the requirements of concrete machinery construction,This kind of cement mechanical strength is at the early period,so as to speced up the progress of construction.It is very suitable with the emergcncy expansion feature,it can be used for prepaing complement contract cement,also a desire material for stopping gush and leaking stoppage.It is widely used for defense tasks and emergency construction,large-scale foundations and burying hole grouting,fast installation,waterproof coating layer of underground architecture,mortar anchors of assembly type reinforcement concrete structure boards and columns,sealing operations of piping and drilling holes,tunnel holes,metro & harbor,highway bridges,airport runing road,and reinforcement strengthening repair,etc.emergcncy enginecrings.

II. Desired quality
1. Fineness:0.080mm square hole is less than 10%
2. Condeusing time:
Primary Condensing:not less than 5min.
Final Condensing:not more than 40min;

III.Attention Items for Use
1. Sperstrong cement condensartion is very fast,when preparing mortar or conerete,it should be finished before loosing plastic feature.So each batch should mix certain quantily,when using,it can be mixed The mixing place should be ner the casing site.At first,everything should be prepared,distribution should be clearly,the operation should be fast,it should be in order.
2. If it is not an emergency engineering which needs to delay the operation time for improving the flowability of concrete or mortar,the water reducing agent or buffer can be added,the common water reducing agent has SN-11,wooden sulphonic acid calcium,etc,the common buffer has taitaric acid and citric acid,etc.,the quantity of which should be decided according to the experiments.
3. Superstrong cement water & dust proportion has wide modulation.when water and dust proportion is too high,it can harden,but h condensing time,strength and expansion will be affected,so the proper water & dust proportion should be determined according to the experiments.
4. As the aluminum sulfate mineral water hydrates very fast,the hydrating reaction will happen at once to form hydrate after adding water,when mixing concrete of mortar,it should be finished once,it can not be added with water in the middle of mixing.
5. The viscosity is bigger after superstrong cemetn mixed with water,the vibrating work should be done by machines during construction,so as to avoid hole in the structures.
6. The concrete structures and cement products made of superstrong cement should be strengthened to protect,after casting,the wet straw bags and other absorbing materials should be covered on it at once to keep the structures out surface moistre,the protection time should be lasted for 24 hours.Even though it has been already used,the protection of it should be kept on within 1 days.not to open in the sunshine.
7. The superstrong cement canbe stored for 3 mnths.the Cement warehcuse shducd be dried soas toavoid moisture.

标号
Name No.
抗压强度(Mpa)
Compression pressure strength(Mpa)
抗折强度(Mpa)
Anti folding gtrength(Mpa)
4h 8h 1d 4h 8h 1d
超早-20 3.6 12 20 1.4 2.2 3.5
超早-30 10 16 30 1.8 2.6 4.5
超早-40 14 20 40 22 3.0 5.5

  • 构件修补
    构件修补
    Adhesion of Fast Repair
  • 应用于金茂大厦
    应用于金茂大厦
    Used Jinmao Building

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