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1006 MNC-A1型超早強減水劑hardening accelerating and water reducing admixture

放大字體  縮小字體 發(fā)布日期:2009-01-09  來源:中國混凝土網(wǎng)  作者:中國混凝土網(wǎng)
核心提示:1006 MNC-A1型超早強減水劑hardening accelerating and water reducing admixture
  本劑超早強、高強,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可以達到設計強度的50%,3d的強度達到不摻外加劑混凝土28d的強度。摻加本劑的混凝土在用滑升模板施工時,10h可以達到拆模強度;在用大模板施工時,1d可以達到拆模強度;50℃養(yǎng)護12h可以達到設計強度的75%。本劑適用于常溫、低溫和負溫(最低氣溫不低于-8℃)環(huán)境中施工的有早強要求的普通混凝土、鋼筋混凝土和預應力混凝土工程。執(zhí)行標準:GB 8076-1997
一、適用范圍
1、適用于現(xiàn)澆和預制混凝土、預應力鋼筋混凝土及外摻粉煤灰混凝土,對普通硅酸鹽水泥、礦渣硅酸鹽水泥和火山灰硅酸鹽水泥等均有較好的適應性。本產(chǎn)品對混凝土冬季施工效果更為顯著。
2、適用于自然養(yǎng)護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,早期增強尤佳,可大大加快模板和場地周轉(zhuǎn),縮短工期。
二、主要性能
1、本產(chǎn)品為棕褐色粉劑,無毒、無臭、不燃,對鋼筋無銹蝕作用。
2、該產(chǎn)品是一種復合的具有較大減水效果且增強作用顯著的超早強高效減水劑。
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翉姸仍鲩L率高。其一天抗壓強度可提高120%以上,三天抗壓強度提高80%以上,二十八天抗壓強度提高30%以上。早期強度大大提高,在標準養(yǎng)護條件下,三天可達設計強度。
4、在坍落度與強度基本相同的情況下,可節(jié)約水泥15%以上。
三、摻MNC-A1型超早強高效減水劑混凝土(參考值)
檢驗項目
企標
檢測結果
檢測項目
企標
檢測結果
減水率(%)
≥18
20.4
抗壓強度比(%)
1d
120
225
泌水率比(%)
≤90
90
3d
180
186
含氣量(%)
≤3.0
2.5
7d
160
137
凝結時間差(min)
初凝
-90~+90
+57
28d
130
134
終凝
+55
收縮率比(%)
28d
≤135
120
對鋼筋銹蝕作用
注:檢測摻量2.5%(以水泥用量計)。
四、推薦摻量
本產(chǎn)品的摻量范圍為2.5%,檢測摻量為2.5%(以水泥用量計)。
五、使用方法
1、本產(chǎn)品可與水泥一起加入攪拌機,計量必須準確。
2、為攪拌均勻,應延長破包受潮。
六、包裝、運輸、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、運輸時謹防遇鋒利物,以防止破包受潮。
3、應貯存在通風、干燥的專用倉庫內(nèi),有效期二年。超過有效期經(jīng)檢測合格后仍可使用。若受潮結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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