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1006 MNC-A1型超早強(qiáng)減水劑hardening accelerating and water reducing admixture

放大字體  縮小字體 發(fā)布日期:2009-01-09  來(lái)源:中國(guó)混凝土網(wǎng)  作者:中國(guó)混凝土網(wǎng)
核心提示:1006 MNC-A1型超早強(qiáng)減水劑hardening accelerating and water reducing admixture
  本劑超早強(qiáng)、高強(qiáng),用于搶修搶建混凝土工程。使用本劑的混凝土工程在常溫(20±3℃)下1d可以達(dá)到設(shè)計(jì)強(qiáng)度的50%,3d的強(qiáng)度達(dá)到不摻外加劑混凝土28d的強(qiáng)度。摻加本劑的混凝土在用滑升模板施工時(shí),10h可以達(dá)到拆模強(qiáng)度;在用大模板施工時(shí),1d可以達(dá)到拆模強(qiáng)度;50℃養(yǎng)護(hù)12h可以達(dá)到設(shè)計(jì)強(qiáng)度的75%。本劑適用于常溫、低溫和負(fù)溫(最低氣溫不低于-8℃)環(huán)境中施工的有早強(qiáng)要求的普通混凝土、鋼筋混凝土和預(yù)應(yīng)力混凝土工程。執(zhí)行標(biāo)準(zhǔn):GB 8076-1997
一、適用范圍
1、適用于現(xiàn)澆和預(yù)制混凝土、預(yù)應(yīng)力鋼筋混凝土及外摻粉煤灰混凝土,對(duì)普通硅酸鹽水泥、礦渣硅酸鹽水泥和火山灰硅酸鹽水泥等均有較好的適應(yīng)性。本產(chǎn)品對(duì)混凝土冬季施工效果更為顯著。
2、適用于自然養(yǎng)護(hù)的混凝土工程及制品,道路搶修工程。本產(chǎn)品減水增效顯著,早期增強(qiáng)尤佳,可大大加快模板和場(chǎng)地周轉(zhuǎn),縮短工期。
二、主要性能
1、本產(chǎn)品為棕褐色粉劑,無(wú)毒、無(wú)臭、不燃,對(duì)鋼筋無(wú)銹蝕作用。
2、該產(chǎn)品是一種復(fù)合的具有較大減水效果且增強(qiáng)作用顯著的超早強(qiáng)高效減水劑。
3、在混凝土中摻入該產(chǎn)品,在水泥用量和坍落度相同情況下,可減水18%以上?;炷翉?qiáng)度增長(zhǎng)率高。其一天抗壓強(qiáng)度可提高120%以上,三天抗壓強(qiáng)度提高80%以上,二十八天抗壓強(qiáng)度提高30%以上。早期強(qiáng)度大大提高,在標(biāo)準(zhǔn)養(yǎng)護(hù)條件下,三天可達(dá)設(shè)計(jì)強(qiáng)度。
4、在坍落度與強(qiáng)度基本相同的情況下,可節(jié)約水泥15%以上。
三、摻MNC-A1型超早強(qiáng)高效減水劑混凝土(參考值)
檢驗(yàn)項(xiàng)目
企標(biāo)
檢測(cè)結(jié)果
檢測(cè)項(xiàng)目
企標(biāo)
檢測(cè)結(jié)果
減水率(%)
≥18
20.4
抗壓強(qiáng)度比(%)
1d
120
225
泌水率比(%)
≤90
90
3d
180
186
含氣量(%)
≤3.0
2.5
7d
160
137
凝結(jié)時(shí)間差(min)
初凝
-90~+90
+57
28d
130
134
終凝
+55
收縮率比(%)
28d
≤135
120
對(duì)鋼筋銹蝕作用
無(wú)
無(wú)
注:檢測(cè)摻量2.5%(以水泥用量計(jì))。
四、推薦摻量
本產(chǎn)品的摻量范圍為2.5%,檢測(cè)摻量為2.5%(以水泥用量計(jì))。
五、使用方法
1、本產(chǎn)品可與水泥一起加入攪拌機(jī),計(jì)量必須準(zhǔn)確。
2、為攪拌均勻,應(yīng)延長(zhǎng)破包受潮。
六、包裝、運(yùn)輸、貯存
1、本品采用內(nèi)襯塑料袋,外編織袋包裝。每袋凈重25kg±0.13kg 或50kg±0.25kg。
2、運(yùn)輸時(shí)謹(jǐn)防遇鋒利物,以防止破包受潮。
3、應(yīng)貯存在通風(fēng)、干燥的專用倉(cāng)庫(kù)內(nèi),有效期二年。超過(guò)有效期經(jīng)檢測(cè)合格后仍可使用。若受潮結(jié)塊需烘干粉碎后使用。

MNC-A1 SERIES SUPER ACCELERATOR

APPLICATION
It can be applied to deposit and pre-cast concrete, pre-stressed reinforced and fly-ash-cement concrete. It is compatible with regular Portland cement, Portland slag and pozzolanic cement. Intended for winter operations.
PROPERTIES, FEATURES&CHARACTERISTICS
1. Appearance: Dark brown powdery agent. Non-poisonous, odorless, non-inflammable and non-corrosive to steel bars.
2. As a combined super accelerator, it can reduce water and enhance strength.
3. As a condition of blending where cement amount and collapsibility are fixed, water reduction exceeds 18%. Compression strength exceeds 120%, 80%and 30%on the 1st, 3rd day and 28th day after application respectively. At the early stage, strength can rise to desired level in 3 days. Greater enhancement will be shown at the end . As the result, all setting properties will be improved greatly.
4. 15% of cement can be reserved as a condition of blending where collapsibility and strength are fixed.
PARAMETERS & ACCEPTANCE CRITERIA(FOR REFERENCE)

Parameters
Criteria
Actual Results
Parameters
Criteria
Actual Results
Water Reduction, %
≥18
20.4
Compression strength, %
1d
120
225
Water Penetration, %
≤90
90
3d
180
186
Air Content, %
≤3.0
2.5
7d
160
137
Temporal Distribution for setting (min)
Initial setting time
-90~+90
+57
28d
130
134
Terminal setting time
+55
Shrinkage, %
28d
≤135
120
Corrosion to steel bars
None
None
Note: Standard Blend Dosage:2.5 %(as cement amount)
RECOMMENDED BLEND DOSAGE
The blend dosage normally ranges from 2.5%.The standard blend dosage is established at 2.5%.
DIRECTIONS
1. The powdery agent can be agitated together with cement. Accurate measurement is essential.
2. A30-second agitation is required to achieve good homogeneity.
RACKGING, TRANSPORTATION AND STORAGE
1. Woven fabric bag with plastic liner. Net weight: 25kg±0.13 kg or 50 kg±0.25 kg.
2. Cautions should be taken to prevent form being torn by sharp-ended objects while packages are transferred or delivered.
3. It should be stored in a dedicated warehouse that is well-ventilated and dry. It remains effective for two years. At the expiration, re-use is allowed if the testing results fall within the established range. In case of humidity contamination, re-use is allowed after drying and crushing.

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