Normal Consistency Normal Consistency of Hydraulic Portland Cement
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- Category: Science
- Date Submitted: 10/21/2010 08:23 PM
- Pages: 4
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Statement of Objectives
Determine normal consistency of hydraulic Portland cement in accordance with ASTM C 187 standard specifications.
Materials Used
A provided sample of dry Portland Type II Cement was used.
Distilled water was also used.
Apparatus Used
1. Vicat Apparatus adhering to ASTM C 187, see Figure 1.
2. Graduated Cylinders.
3. Mixers adhering to ASTM C 305.
Procedure
1. Figure 1: Vicat Apparatus
To make the first mix, 650 grams of Portland cement and 155 ml of water were measured out.
2. The water was placed in the mixer, and then the cement was added to the water. The mixture sat for 30 seconds to allow the cement to absorb the water.
3. After the 30 seconds, the mixer was turned on a low speed for 30 seconds.
4. Once the 30 seconds of mixing finished, the mixer was shut off and the cement paste was scraped off the sides of bowl. The mix rested for 15 seconds.
5. Once rested, the mixer was turned on medium speed for 60 seconds.
6. After the 60 seconds of mixing, the mix was ready to test. Our group made a ball of cement in the palms of our hands. Once the ball was shaped, it was tossed between hands about 6 times.
7. The ball was inserted in the Vicat ring with a constant pressure. The bottom and top were leveled off to make flat, stable surfaces.
8. We placed the cement and Vicat ring under the rod to test. The rod was placed just above the cement and the indicator needle was set to zero.
9. The rod was released to sink into the cement and the timer was started. After 30 seconds, the distance the rod had sunk was measured.
10. Steps 1 through 9 were repeated with the other mixes. The second mix was 650 grams of Portland cement and 165 ml of water. The third mix was 650 grams of Portland cement and 175 ml of water. The final mix was 650 grams of Portland cement and 185 ml of water. All results were recorded.
Results
Water Content(ml) | Amount of Portland Cement (g) |...
Determine normal consistency of hydraulic Portland cement in accordance with ASTM C 187 standard specifications.
Materials Used
A provided sample of dry Portland Type II Cement was used.
Distilled water was also used.
Apparatus Used
1. Vicat Apparatus adhering to ASTM C 187, see Figure 1.
2. Graduated Cylinders.
3. Mixers adhering to ASTM C 305.
Procedure
1. Figure 1: Vicat Apparatus
To make the first mix, 650 grams of Portland cement and 155 ml of water were measured out.
2. The water was placed in the mixer, and then the cement was added to the water. The mixture sat for 30 seconds to allow the cement to absorb the water.
3. After the 30 seconds, the mixer was turned on a low speed for 30 seconds.
4. Once the 30 seconds of mixing finished, the mixer was shut off and the cement paste was scraped off the sides of bowl. The mix rested for 15 seconds.
5. Once rested, the mixer was turned on medium speed for 60 seconds.
6. After the 60 seconds of mixing, the mix was ready to test. Our group made a ball of cement in the palms of our hands. Once the ball was shaped, it was tossed between hands about 6 times.
7. The ball was inserted in the Vicat ring with a constant pressure. The bottom and top were leveled off to make flat, stable surfaces.
8. We placed the cement and Vicat ring under the rod to test. The rod was placed just above the cement and the indicator needle was set to zero.
9. The rod was released to sink into the cement and the timer was started. After 30 seconds, the distance the rod had sunk was measured.
10. Steps 1 through 9 were repeated with the other mixes. The second mix was 650 grams of Portland cement and 165 ml of water. The third mix was 650 grams of Portland cement and 175 ml of water. The final mix was 650 grams of Portland cement and 185 ml of water. All results were recorded.
Results
Water Content(ml) | Amount of Portland Cement (g) |...