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SUBJECT: Final Report on Concrete Tests
Series & Density | Date Poured | Mix | ability | Appear. Cast Cylinder | Slump | Compressive Strength and Setting | Comments |
A 1/4 | June 19 3:15 P.M. | 13.27# 3/8 Bar. 220.26# 3/4 Bars (Tenn.) 23.53# Col. 48.82#Type III Cement 21.50# Water | Poor | Excellent but had to be rodded ively | 1/4" | 2,820 psi Hard set at about 15 hrs. | Machine mixes all aggregates & cement dry mixed and then all water added and mixed for 2 minutes. |
A 1 | June 19 3:30 P.M. | Mix as above except extra water was added to the remaining portion of A 1/4. | Fair | Excellent some excess rodding ed | 1" | 2,660 psi Initial set about 24 hrs. Hard set 48 hrs. | |
On above mix the 3/8" Barytes was screened to remove material finer than 16 mesh. | |||||||
B | June 21 3:00 P.M. | 2.65# 3/8 Bar. 44.05# 3/4 Bar. (Tenn.) 4.70# Col. 9.80# Type II Cement 3.64# Water (Material finer than 16 mesh in 3/8 Barytes was removed) | Very Poor | Fair Required treme | Too stiff for slup test. | After 8 days in damp room was still soft. Removed to lab., allowed to dry out. Appeared to set and harden. Disintegrated pletely ped | Col. & cement & water hand mixed. Then Bar. added and hand mixed again. |
C | June 21 3:45 P.M. | 10.65# 3/8" as is 36.05# 3/4 Tenn. Bar. 4.70# Col. 9.80# Type II Cement 4.14# Water | Poor | Good Required excess rodding | Too stiff for slump test. | As above for B. | As above for B. |
Series & Density | Date Poured | Mix | ability | Appear. Cast Cylinder | Slump | Compressive Strength and Setting | Comments |
D | June 22 1:05 P.M. | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III cement Penn Dixie 4.00# Water | Fair to Poor | Excellent Required excess rodding | Too stiff | 5,000 psi Hard set in less than 15 hrs. | Mixed Bar. & cement & 3.64# water by hand. Set in damp room 40 minutes. Removed, added and mixed col. Added .36# more water and mixed again. |
E 41.5# 218#/cu.ft. | July 9 4:45 P.M. | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III P.D. 4.00# Water .1 fluid oz. Darex | Fair Mix seemed more form was sticky and had oily perance | Fair, some honeycombe needed. Excess rodding | Too stiff. | 3,950 psi Not set 10 A.M. July 10. Taking initial set 5 P.M. July 10. Hard set 3 P.M. July 11. | Hand mixed all materials except col. This was added about 5 min. later and then whole mixed |
F 41.62# 219# cu.ft. | July 9 5:40 P.M. | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III P.D. 4.40# water .1 fluid oz. Darex | Good Uniform mix, but sticky and still oily in appear. | Good to excellent | Slump not run, but would have been about 1". | 4,130 psi Setting comments same as E. | Mixing same as E. |
G 40.82# 215# cu.ft. | July 10 11:55 A.M. poured | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III P.D. 4.6# Water | Good to fair. | Good to lent quired rodding | 1/4" | 5,380 psi Hard set at 3:00 P.M. July 11. | Hand mixed everything without the col. Put in humidity room for 5 min. Removed, added colemanite, remixed and poured |
Series & Density | Date Poured | Mix | ability | Appear. Cast Cylinder | Slump | Compressive Strength and Setting | Comments |
H | July 10 11:45 A.M. | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III P.D. 4.00# water .20# Puzzolith | Best ty | Poor, Bad Honeycombe. Cast cyl. led Seemed to have been chem. action Bar. And Puzz. | Not run. | Not tested because of honeycombe. Not hard set at 3:00 P.M. July 11. Was hard set at 10:00 P.M. July 12. | Hand mixed all ingredients except col. Added this and remixed. |
J 40.96# 216#/cu.ft. | July 10 4:30 P.M. | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III P.D. 4.50# water .05# Puzzolith. | Best ability thus far. | Good, some honeycombe. Normal rodding. Inferior to K. | Not run. | 5,020 psi. Hard set 3:00 P.M. July 11. | Hand mixed Bar., cement, and 4.20# water. Put in humid room for 45 minutes. Removed, mixed in col., added .30# water mixed. |
K 40.72# 214# cu.ft. | July 10 5:00 P.M. | 46.70# Bar. Ga. 4.70# Col. 9.80# Type III P.D. 4.50# water 5 cc Darex | Excellent but not as good as J. Mix still seemed oily and sticky. | Excellent. Better than J. Normal Rodding. | Not run. | 4,820 psi Hard set 3:00 p.m. July 11 | Hand mixed Bar. & cement & 4.20# water. Set in humid room 45 min. Removed, mixed in colemanite, added .30# water, mixed. |
L 40.50# 213# cu. ft. | July 12 12:50 P.M. | 93.40# Bar. Ga. 9.40# Col. 19.60# Type III P.D. 9.60# Water | Excellent Best of all. | Excellent smooth appear. | 2 1/2" | 4,750, Hard set at 4:00 P.M. July 13. Shrinkage of test cyl. appeared about same as normal concrete. | Machine mixed. Bar. & cement & 8.80# water. Held in mixer for 40 min. added col. and mixed. Added .80# water and mixed again. |
This is the recommended mix for the Reactor Concrete. C.R.B. |
Series & Density | Date Poured | Mix | ability | Appear. Cast Cylinder | Slump | Compressive Strength and Setting | Comments |
N 28.75# 150.5# cu.ft. | July 12 | 30# gravel 20# sand 7# Type III P.D. 6# Water | Too wet | Excellent | Excess slup | Not run | Hand mixed. |
Plain concrete cyl. for comparison only. |