Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of iron whisker toughened cement-based composite material
The invention provides a preparation method of an iron whisker toughened cement-based composite material. Comprising the following steps: step 1, taking ferrous chloride as a raw material, and synthesizing fine iron whiskers in a tubular furnace by using a hydrogen reduction method; step 2, preparing a sodium carboxymethyl cellulose aqueous solution with a certain concentration, and carrying out sodium carboxymethyl cellulose wrapping treatment on the surface of the iron whisker; step 3, uniformly dispersing the iron whiskers coated with the sodium carboxymethyl cellulose on the surfaces into cement by using a wet ball milling process to obtain mixed powder of the whiskers and the cement; 4, the mixed powder is subjected to conventional hydration solidification, and the iron whisker toughened cement-based composite material is obtained. The diameter of the iron whisker is only 0.5-2 microns and is far smaller than the diameter of the steel fiber (the difference is about 1000 times). The iron whisker provided by the invention has good strength and plasticity. Therefore, besides the toughening effects of pulling out, bridging, deflection and the like of the inorganic fibers, the iron whiskers can also generate plastic deformation to consume more fracture energy, so that the fracture toughness of the whole material is improved.
本发明提供了一种铁晶须增韧水泥基复合材料的制备方法；包括：步骤1，以氯化亚铁为原料，利用氢气还原法在管式炉中合成细小铁晶须；步骤2，配制一定浓度的羧甲基纤维素钠水溶液，对铁晶须的表面进行包裹羧甲基纤维素钠处理；步骤3，利用湿法球磨工艺将表面包裹羧甲基纤维素钠的铁晶须均匀分散到水泥中，得到晶须与水泥的混合粉料；步骤4，将混合粉料经常规水化凝固，即得铁晶须增韧的水泥基复合材料。本发明铁晶须的直径仅为0.5‑2μm，远远小于钢纤维直径(相差约1000倍)。本发明所涉及的铁晶须具有良好的强度和塑性。所以除了无机纤维的拔出、桥接和偏转等增韧效应外，铁晶须还可以发生塑性变形，消耗更多断裂能，进而增加整体材料的断裂韧性。
Preparation method of iron whisker toughened cement-based composite material
The invention provides a preparation method of an iron whisker toughened cement-based composite material. Comprising the following steps: step 1, taking ferrous chloride as a raw material, and synthesizing fine iron whiskers in a tubular furnace by using a hydrogen reduction method; step 2, preparing a sodium carboxymethyl cellulose aqueous solution with a certain concentration, and carrying out sodium carboxymethyl cellulose wrapping treatment on the surface of the iron whisker; step 3, uniformly dispersing the iron whiskers coated with the sodium carboxymethyl cellulose on the surfaces into cement by using a wet ball milling process to obtain mixed powder of the whiskers and the cement; 4, the mixed powder is subjected to conventional hydration solidification, and the iron whisker toughened cement-based composite material is obtained. The diameter of the iron whisker is only 0.5-2 microns and is far smaller than the diameter of the steel fiber (the difference is about 1000 times). The iron whisker provided by the invention has good strength and plasticity. Therefore, besides the toughening effects of pulling out, bridging, deflection and the like of the inorganic fibers, the iron whiskers can also generate plastic deformation to consume more fracture energy, so that the fracture toughness of the whole material is improved.
本发明提供了一种铁晶须增韧水泥基复合材料的制备方法；包括：步骤1，以氯化亚铁为原料，利用氢气还原法在管式炉中合成细小铁晶须；步骤2，配制一定浓度的羧甲基纤维素钠水溶液，对铁晶须的表面进行包裹羧甲基纤维素钠处理；步骤3，利用湿法球磨工艺将表面包裹羧甲基纤维素钠的铁晶须均匀分散到水泥中，得到晶须与水泥的混合粉料；步骤4，将混合粉料经常规水化凝固，即得铁晶须增韧的水泥基复合材料。本发明铁晶须的直径仅为0.5‑2μm，远远小于钢纤维直径(相差约1000倍)。本发明所涉及的铁晶须具有良好的强度和塑性。所以除了无机纤维的拔出、桥接和偏转等增韧效应外，铁晶须还可以发生塑性变形，消耗更多断裂能，进而增加整体材料的断裂韧性。
Preparation method of iron whisker toughened cement-based composite material
一种铁晶须增韧水泥基复合材料的制备方法
LIU XING (Autor:in) / CHEN SHANMIN (Autor:in) / ZHANG GUIPING (Autor:in) / LIU BO (Autor:in) / WEI FULU (Autor:in) / ZHANG JIA (Autor:in) / GUAN BOWEN (Autor:in) / ZENG DEJUN (Autor:in)
06.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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