A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to the technical field of concrete materials, and particularly discloses alkali-activated fly ash concrete and a preparation method thereof. The alkali-activated fly ash concrete comprises fine aggregate, coarse aggregate, an alkali activator, anhydrous sodium silicate, fly ash, slag powder, a retarder and an inhibitor. The preparation method comprises the following steps: (1) adding the coarse aggregate and the fine aggregate into a stirrer, and uniformly stirring for 2 minutes; (2) sequentially adding alkali-activated fly ash, sodium hexametaphosphate, a naphthalene-based superplasticizer and xanthan gum into the stirrer, and continuously stirring for 5 minutes under the conditions that the temperature is 40 DEG C and the pH is equal to 13; and (3) finally adding stearic acid, and continuously stirring for 30 seconds to obtain the alkali-activated fly ash concrete. The modified fly ash provided by the invention can be used for concrete, and has the advantage of generating alkali-activated silicon-aluminum-based colloid; in addition, the preparation method has the advantage of improving the compressive strength of the concrete.
本申请涉及混凝土材料技术领域，具体公开了一种碱激发粉煤灰混凝土及其制备方法。碱激发粉煤灰混凝土包括细骨料、粗骨料、碱激发剂、无水硅酸钠、粉煤灰、矿渣粉、缓凝剂、抑制剂；其制备方法为：包括以下步骤：（1）将粗骨料和细骨料加入到搅拌机中搅拌2min，搅拌均匀；（2）再向搅拌机中依次加入碱激发粉煤灰、六偏磷酸钠、萘系高效减水剂、黄原胶，在40℃，pH=13的条件下，继续搅拌5min；（3）最后再加入硬脂酸，继续搅拌30s,制得碱激发粉煤灰混凝土。本申请的改性粉煤灰可用于混凝土，其具有产生碱激发硅铝基胶体的优点；另外，本申请的制备方法具有提高混凝土的抗压强度优点。
The invention relates to the technical field of concrete materials, and particularly discloses alkali-activated fly ash concrete and a preparation method thereof. The alkali-activated fly ash concrete comprises fine aggregate, coarse aggregate, an alkali activator, anhydrous sodium silicate, fly ash, slag powder, a retarder and an inhibitor. The preparation method comprises the following steps: (1) adding the coarse aggregate and the fine aggregate into a stirrer, and uniformly stirring for 2 minutes; (2) sequentially adding alkali-activated fly ash, sodium hexametaphosphate, a naphthalene-based superplasticizer and xanthan gum into the stirrer, and continuously stirring for 5 minutes under the conditions that the temperature is 40 DEG C and the pH is equal to 13; and (3) finally adding stearic acid, and continuously stirring for 30 seconds to obtain the alkali-activated fly ash concrete. The modified fly ash provided by the invention can be used for concrete, and has the advantage of generating alkali-activated silicon-aluminum-based colloid; in addition, the preparation method has the advantage of improving the compressive strength of the concrete.
本申请涉及混凝土材料技术领域，具体公开了一种碱激发粉煤灰混凝土及其制备方法。碱激发粉煤灰混凝土包括细骨料、粗骨料、碱激发剂、无水硅酸钠、粉煤灰、矿渣粉、缓凝剂、抑制剂；其制备方法为：包括以下步骤：（1）将粗骨料和细骨料加入到搅拌机中搅拌2min，搅拌均匀；（2）再向搅拌机中依次加入碱激发粉煤灰、六偏磷酸钠、萘系高效减水剂、黄原胶，在40℃，pH=13的条件下，继续搅拌5min；（3）最后再加入硬脂酸，继续搅拌30s,制得碱激发粉煤灰混凝土。本申请的改性粉煤灰可用于混凝土，其具有产生碱激发硅铝基胶体的优点；另外，本申请的制备方法具有提高混凝土的抗压强度优点。
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