Cementitious compositions and a method of their use
A composition, cement technology, applied in the field of surface treatment, rock surface
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Examples
Embodiment 1-4
[0082] Examples 1-3 are not according to the invention, but are intended for comparison.
[0083] A series of curable coating compositions were prepared with varying amounts of calcium sulfate and the various compositions were used as coatings.
[0084] After the coating was formed, the tensile strength was measured at intervals from 2 hours.
[0085] Flexibility at 6 months was also measured.
[0086] Details of the composition are summarized in Table 1 along with the results of the tensile strength and flexibility measurements.
[0087] All parts used are by weight.
[0088] R.H. means relative humidity.
[0089] HAC means high alumina cement.
[0090] Table 1
[0091] Example 1
Example 2
Example 3
Example 4
Component A
HAC *
70.36
80.27
88.40
99.40
29.31
19.13
11.00
0.00
0.10
...
Embodiment 5 and 6
[0098] Examples 5 and 6 are examples according to the present invention. Different amounts of fiber were included in Examples 5 and 6.
[0099] The tensile strength of the coating obtained from the composition was measured at time intervals from 2 hours after the coating was formed.
[0100] Details of the composition and tensile strength measurements are shown in Table 2.
[0101] Table 2
[0102] Component A
Example 4
Example 5
Example 6
HAC
99.4
98.1
96.8
0.00
0.00
0.00
0.44
0.44
0.44
Sodium enanthate
0.16
0.16
0.16
Fiber (+%)
0
1.3
2.6
total
100.00
100.00
100.00
Component B
Taevalon
200.00
200.00
200.00
Weight ratio of component B to component A
2∶1
...
Embodiment 7-12
[0112] A series of compositions were prepared with varying amounts of fiber and used as coatings.
[0113] HAC and fibers were the same as those used in Examples 5 and 6.
[0114] After the coating was formed, the tensile strength was measured at intervals from 2 hours.
[0115] Flexibility at 6 months was also measured.
[0116] The details of the compositions are reported in Table 3 along with the results of the tensile strength measurements.
[0117] table 3
[0118] Example number
7
8
9
10
11
12
Component A
weight
weight
weight
weight
weight
weight
HAC
99.41
98.91
98.41
97.41
96.41
95.41
0.43
0.43
0.43
0.43
0.43
0.43
Sodium enanthate
0.16
0.16
0.16
0.16
0.16...
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Abstract
Description
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