Part 17 (2/2)
”The following Report shows results of Tests made by the National Physical Laboratory
[Headnote: Pise Tests]
”REPORT ON TESTS OF BUILDING BLOCKS OF PISe DE TERRE SENT FOR TEST BY MESSRS W ALBAN RICHARDS & CO, LTD
”_Tests made on January 14, 1920_
”First set of three blocks sent in Noveravel containing very few and very small stones The material was said to be similar to that used at Merron, near Guildford, Surrey It appeared to be very siravel
”The blocks were tested in compression, one within twenty-four hours of arrival at the laboratory, and the others after drying for a time in the laboratory For results of tests see Table I
TABLE I
----+------+--------------+----+----+-------+-----+-------+---------- | | | | | | LOAD | | | |Age |Area|Density+-----+-------+ | | | in | in | lbs | |in tons| | | Dimensions |days|sq | per | in | per | No |Marks| in inches ||ft |c ft |tons |sq ft| REMARKS
----+------+--------------+----+----+-------+-----+-------+---------- UT1 | 3 | 999 | 1 |562| 131 |070 | 166 |Cracked | | | | | |104 | 247 |Collapsed | | | | | | | | UT2 | 1 | 898989 | 9 |550| 125 |427 | 1050 |Collapsed | | | | | | | | UT3 | 2 |895895895|16 |556| 117 |231 | 557 |Small | | | | | |423 | 1020 | cracks | | | | | | | | appeared ----+------+--------------+----+----+-------+-----+-------+----------
[: Age after arrival at laboratory]
”Second set of blocks sent in December 1919
”This set consisted of six blocks in three pairs, each pair having been rammed with a different quantity of water
”One of each pair was tested within twenty-four hours of arrival at the laboratory, and the others after drying in the laboratory for twenty-six days
”The eneous, and the mixture consisted of a very clayey loae stones The clayey ave rise to surface cracks as the blocks dried
”For results of tests see Table II
TABLE II
----+------+------------+----+----+-------+-----+-------+---------- | | | | | | LOAD | | | |Age |Area|Density+-----+-------+ | | | in | in | lbs | |in tons| | |Dimensions |days|sq | per | in | per | No |Marks| in inches ||ft |c ft |tons |sq ft| REMARKS
----+------+------------+----+----+-------+-----+-------+---------- VW1 | 1 | 89985 | 1 |555| 106 |045 |081 |Cracked at | dry | | | | | | | one corner | | | | | |051 |092 |Collapsed | | | | | | | | VW2 | 2 | 999 |26 |562| 105 |215 |384 |Collapsed
| dry | | | | | | | Material | | | | | | | | quite dry | | | | | | | | in interior | | | | | | | | VW3 | 3 |919189 | 1 |570| 134 |055 |096 |Collapsed | wet | | | | | | | | | | | | | | | VW4 | 4 |888889 |26 |546| 110 |320 |586 |Collapsed
| wet | | | | | | | Material | | | | | | | | quite dry | | | | | | | | in interior | | | | | | | | VW5 | 5 | 9899 | 1 |558| 126 |060 |108 |Bulged and |medium| | | | | | | cracked | | | | | |069 |124 |Collapsed | | | | | | | | VW6 | 6 | 88887 |26 |546| 109 |333 |610 |Collapsed
|htly | | | | | | | | damp in | | | | | | | | the interior ----+------+------------+----+----+-------+-----+-------+----------
[: Age after arrival at laboratory]
Seal of NATIONAL PHYSICAL LABORATORY _Signature of Director_
”From the second set of blocks it would appear that it is better to ram with too much moisture than with too little It will be noted that the density of the wet block was 30 per cent more than that of the dry block, so that a wall could be carried higher with the dry ain the strength which a wet one would upon drying
CONCLUSIONS
”We are of opinion, having regard to the fact that the house at Newlands Corner (Guildford four ns of dahly dry house