Om Materialprøvningens Udvikling i Norden
Og om Statsprøveanstaltens Virksomhed

 ■u.W4J zww 141 course, due to the many small air-holes occurring in and between the skeletons of the silicious algse. For this reason the moler bricks will be well adapted as backing-bricks in outer walls, where the house is wanted to be sheltered. In hollow outer walls they will presumably be excellently adapted for the internal part of the wall. On account of the same property they will be suitable as vault bricks and for the covering of columns and beams in iron-constructions. It is also specially recommended to employ them in the walls of ice-houses, cooling-rooms and dairy premises and in cheese-rooms. These bricks can also be employed as fil- tering-stones and whetstones. On a single very important point the moler bricks were, how- ever, in want of research. It was not known, how the bricks would be able to resist the strong heat of a fire, and regarding I heir value as building material it was, of course, of great impor- tance to become clear of this point. One was aware of the not slight shrinkage of the bricks during their own burning. On this was thrown light by some experiments made by the Laboratory in 1907 for Frederiksholm’s Brickworks Co. Itd. given below. »Result of fire test with one bricks wall built of moler bricks made according to the requisition of The Frederiksholms Brick- and Limeworks, Co. Itd.« An examination was wanted as to a one bricks wall being able to resist the effect of a fire without the bearing strength of the wall being diminished because the individual bricks were vitrified or melted. In the territory of the Eastern Gas-Works an experimental house was built the construction of which appears from the present photographs. The experimental house had a height of 157 cm and was run up of one brick’s wall. The middle transverse wall was built of moler bricks, namely 6" broad partition-bricks, sent in by Frederiksholm’s Brick- and Lime- works. These bricks were laid with the breadth at right angles to the thickness of the wall and in bond with the outer walls consisting of yellow clinkers. Above the experimental covered with fire-proof bricks placed so close, that just sufficient outlet for the smoke. On the bottom of each of the two cell-like rooms perimental house were placed 3 large Bunsen-burners, thus alto- I house was there was of the ex- ■ \