Appendix C, Freeze-Thaw Resistance of Concrete With Marginal Air Content, FHWA-HRT-06-117

Freeze-Thaw Resistance of Concrete With Marginal Air Content

Table 77. Durability factor sets 1 and 2—sorted by fresh air content.
Mixes	Admixture	Mean	s	ni	Pooled s²	S.E.	t0	t(.05,n1+n2-2)	Prob (t)	Conclusion
227–348	Vinsol	87.85	1.48	5	22.59	3.19	−18.55	2.365	0.0000003	Different
227–348	Synthetic	28.72	7.06	4	22.59	3.19	−18.55	2.365	0.0000003	Different
225–346	Vinsol	90.17	0.64	5	30.32	3.69	−9.35	2.365	0.0000332	Different
225–346	Synthetic	55.62	8.38	4	30.32	3.69	−9.35	2.365	0.0000332	Different
224–347	Vinsol	85.69	1.18	5	11.89	2.31	−4.38	2.365	0.0032219	Different
224–347	Synthetic	75.55	5.09	4	11.89	2.31	−4.38	2.365	0.0032219	Different
223–349	Vinsol	88.87	2.79	5	78.59	5.95	−3.92	2.365	0.0057823	Different
223–349	Synthetic	65.58	13.15	4	78.59	5.95	−3.92	2.365	0.0057823	Different
226–350	Vinsol	93.53	1.26	5	8.02	1.90	−5.88	2.365	0.0006102	Different
226–350	Synthetic	82.35	4.07	4	8.02	1.90	−5.88	2.365	0.0006102	Different

Table 78. Mass change sets 1 and 2—sorted by fresh air content.
Mixes	Admixture	Mean	s	ni	Pooled s²	S.E.	t0	t(.05,n1+n2-2)	Prob (t)	Conclusion
227–348	Vinsol	−1.61	0.11	5	0.05	0.16	8.34	2.365	0.0000697	Different
227–348	Synthetic	−0.32	0.33	4	0.05	0.16	8.34	2.365	0.0000697	Different
225–346	Vinsol	−1.79	0.39	5	0.18	0.28	−7.89	2.365	0.0000996	Different
225–346	Synthetic	−4.03	0.47	4	0.18	0.28	−7.89	2.365	0.0000996	Different
224–347	Vinsol	−2.56	0.45	5	0.12	0.23	2.16	2.365	0.0680295	Different
224–347	Synthetic	−2.06	0.06	4	0.12	0.23	2.16	2.365	0.0680295	Different
223–349	Vinsol	−2.59	0.22	5	0.48	0.46	−1.02	2.365	0.3426067	Not significantly different
223–349	Synthetic	−3.06	1.03	4	0.48	0.46	−1.02	2.365	0.3426067	Not significantly different
226–350	Vinsol	−2.02	0.29	5	0.11	0.23	−3.16	2.365	0.0159507	Different
226–350	Synthetic	−2.74	0.39	4	0.11	0.23	−3.16	2.365	0.0159507	Different