Effects of Aluminum Silicate on Mechanical Strength and Microstructural Improvement of Magnesium Phosphate Cement Mortar

2020 ◽  
Vol 32 (12) ◽  
pp. 04020360
Author(s):  
M. Aminul Haque ◽  
Dong Pen ◽  
Bing Chen
Keyword(s):  
Mechanical Strength ◽  
Cement Mortar ◽  
Magnesium Phosphate ◽  
Aluminum Silicate

Effects of combined accelerating admixtures on mechanical strength and microstructure of cement mortar

2021 ◽  
Vol 304 ◽  
pp. 124642
Author(s):  
Guosheng Ren ◽  
Zhijie Tian ◽  
Jingjiang Wu ◽  
Xiaojian Gao
Keyword(s):  
Mechanical Strength ◽  
Cement Mortar

scholarly journals Strengthening of potassium-magnesium-phosphate cement by adding additives of wollastonite and slag of metallurgical plants

2017 ◽  
Vol 117 ◽  
pp. 125-137
Author(s):  
S. Yu. Sayenko ◽  
V. A. Shkuropatenko ◽  
R. V. Tarasov ◽  
K. A. Ulybkina ◽  
L. M. Litvinenko ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Phase Composition ◽  
Mechanical Strength ◽  
Homogeneous Structure ◽  
Magnesium Phosphate ◽  
Metallurgical Combine ◽  
Potassium Magnesium

The mechanical strength under compression, the structure and the phase composition of potassium-magnesium-phosphate cement with different amounts of additives (10, 15, 20 wt. %) of wollastonite and slag of the Mariupol metallurgical combine, “Zaporozhstal” plant and the Dnepropetrovsk metallurgical combine were studied. The resulting material has a homogeneous structure, which is represented by a potassium-magnesium-phosphate matrix with uniformly distributed inclusions of other phases. It is established that the compressive strength σc reaches a maximum with the addition of 20 wt. % wollastonite (23.2 N/mm2) and 20 wt. % of the slag Mariupol metallurgical combine (31.6 N/mm2).

scholarly journals The effect of silanes as integral hydrophobic admixture on the physical properties of cement based materials

2021 ◽  
Vol 2069 (1) ◽  
pp. 012045
Author(s):  
K Grabowska ◽  
A Wieczorek ◽  
D Bednarska ◽  
M Koniorczyk
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Water Absorption ◽  
Cement Mortar ◽  
Organosilicon Compounds ◽  
Capillary Water ◽  
Main Ingredient ◽  
Capillary Water Absorption ◽  
Cement Based Materials

Abstract The paper explores the possibility of using organosilicon compounds (e.g., poly(dimethylsiloxane) and triethoxyoctylsilane) in commercial admixtures as internal hydrophobization agents for porous cement-based materials. The study involved the cement mortar with five different hydrophobic admixtures. Four of them is based on triethoxyoctylsilane, but with various concentration of the main ingredient, and one of them on poly(dimethylsiloxane). Mechanical properties, capillary water absorption, as well as microstructure were investigated. The organosilicon admixtures efficiently decrease the capillary water absorption even by 81% decreasing mechanical strength of cement mortar at the same time even by 55%. Only one admixture, based on poly(dimethylsiloxane) caused significant changes in microstructure of cement mortar.

Mechanical Strength and Microstructure Analysis of Cementitious Wheat Straw Composite

2013 ◽  
Vol 357-360 ◽  
pp. 766-772
Author(s):  
Lin Zhang ◽  
Fu Sheng Liu ◽  
Ji Yong Song ◽  
Yan Bin Zhang ◽  
Gang Gang Dong
Keyword(s):  
Mechanical Strength ◽  
Wheat Straw ◽  
Thermal Insulation ◽  
Bending Strength ◽  
Cement Mortar ◽  
Alkali Treatment ◽  
Sem Images ◽  
Mortar Specimen ◽  
Increased Strength ◽  
Straw Composite

Wheat straw alkali treatment has impacts on the strength of cement mortar and glazed hollow beads insulation mortar. The results show that the bending strength and bending strength of cement mortar specimen with 4% wheat straw are respectively 58.3% and 40.9% of the benchmark specimen, but bending-press ratio of the latter is 1.42 times of the former. The SEM images reflect the straws influences on the cement hydrate morphology, status and the influence of the number on cement mortar and glazed hollow beads insulation mortar. Compared with the latter, the former C-S-H gel is loose fibrous, failure to form a good network. In the thermal insulation mortar consistency and stratification of the same circumstances, with straw dosage increased, strength first increases, then declining. And folding pressure than in straw dosage is less than 24% more ideal. The SEM pictures show that network C-S-H gel decrease and loose fibrous C-S-H gel increased. At the same time, AFt gradually become attenuate and curly.

Properties of Phosphate Cement Mortar Used as Rapid-Repair Material

2011 ◽  
Vol 250-253 ◽  
pp. 1752-1756 ◽  
Author(s):  
Hong Wei Deng ◽  
Ying Zi Yang ◽  
Xiao Jian Gao
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
No Reduction ◽  
Cement Mortar ◽  
Magnesium Phosphate ◽  
Strength Development ◽  
Repair Material ◽  
Rapid Repair ◽  
Repair Materials ◽  
Early Strength

In order to determine the optimal proportion of magnesium phosphate cement mortar, the influences of ratio of magnesium phosphate cement-based binder (MPB) to sand (MPB/S), effects of fly ash on fluidity and strength development of MPB mortar, and the compatibility between MPB and traditional concrete and shrinkage of MPB mortar were investigated in this paper. The optimal proportion in this test was: setting adjusting agent of 12%, P/M ratio of 1:2(in weight), MPB/S ratio of 1:1 and FA/S ratio of 15%. The results showed that the MPB mortar met the higher early strength requirement of rapid-repair materials, with compressive strength beyond 50MPa and flexural strength more than 9.1MPa at 3 hours, and at later ages no reduction of strength happened. There was a good compatibility between MPB and traditional concrete. The shrinkage of MPB mortar at 28 days was less than 2.89 × 10-4. Therefore MPB is very suitable for rapid repairing of concrete structures.

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