英語翻譯
關(guān)于：氯氧鎂水泥混凝土
Compressive and transverse strengths of cement mortar paste
Cement mortars were prepared by gauging the dry mixes of magnesia and dolomite powders in the ratio of 1 :3,1 :4 and 1 :5 by mass with magnesium chloride solution
of concentrations from 16°Be–36°Be as per standard consistency.The compressive and transverse strengths of cement mortars were ascertained from tests on cubes of size 70⋅6 mm and bars of 100 × 25 × 25 mm size,respectively.The specimens were prepared in metal moulds placed on non absorbent plates.The moulds were filled with the paste and were consolidated with light pressure only.The surface was made smooth with a blade of a trowel.These specimens were placed at 27 ± 2°C and in an atmosphere of 90% relative humidity for 24 h.After this,the specimens were removed from the moulds and were kept in desiccators at 60–70% relative humidity.The specimens were tested at the age of 7 days and 28 days as per IS 10132-1982.
Abrasion resistance of concrete
Abrasion resistance of concrete under physical effects was determined as per IS:9284-1979.The test was conducted on 28-day cured cube specimens from each set.Pneumatic sand blasting cabinet equipment was used and the abrasive charge used was standard sand driven by air pressure.The abrasion loss of specimen was taken as the percentage loss in mass for two separate impressions on the same face of the cube under test.
Conclusions
(I) MOC cement is an early setting,high strength cement and can bind high proportions of aggregates and fillers.
(II) MOC cement concrete compositions have good rheological properties with excellent workability and placing characteristics.After setting,it does not require water
curing.
(III) MOC cement concrete has high compressive strength associated with high flexural strength.This property can obviate the need of fibre reinforcement in MOC concrete,and permits reduction in slab thickness of concrete pavement.
(IV) MOC cement concrete has very high elastic modulus as compared to Portland cement concrete of same compressive strength.
(V) MOC cement concrete of desired strengths can be prepared by using various dry compositions and concentrations of gauging solution.
(VI) Replacement of 10% magnesium chloride solution by magnesium sulphate solution of same concentration makes the concrete resistant towards extreme weather conditions.
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