What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
26 hours Immersed 48 hours Dried absorption value air several days apparent specific gravity arrises Average stressed area bed Perpendicular bedding not distinguishable began to spall calcite marble Cockeysville column see footnote compression tests compressive strength cubic foot days Immersed determine different samples distinctly roughened dolomitic marbles Dried in laboratory edge On bed effect of freezing expansion of marble exterior faces faces of cube freezing tests frozen cubes granulation heating Hence Highest Lowest Average Immersed in water laboratory air loss in strength obtained Oolitic limestone Pale pink Parallel to bed Permanent expansion Perpendicular to bed porosity pounds per square prisms quarries slabs specimen spherical block strain lines surface symbols in Remarks TABLE Tenn Tests made Manner tion total pore space transverse strength types of stone volume warping water 48 hours water absorbed weight per cubic West Rutland White crystalline dolomite White crystalline limestone
Page 2 - HARVARD UNIVERSITY GEOLOGICAL SCIENCES LIBRARY Transferred to CABOT SCIENCE LIBRARY June 2005 , 7═956 Œbe dnivereitš of CbÝcago FOUNDED BY JOHN D.
Page 30 - the permanent expansion as well as the rate of expansion appears to become less for each successive heating, and the expansion for temperatures between 18' and 60░ C. appears to become almost negligible at the fifth and sixth heating." If rocks in general accumulate expansive strain caused by repeated heatings over moderate ranges, it seems not improbable that the strength of the rock would eventually be exceeded and fractures would then occur. It is important...
Page 28 - The tests registered below were made with a view of determining not merely the relative solubility of certain calcareous rocks used for building and ornamental work, but as well, the manner in which the solvent acted. The ultimate aim of the experiments, as is obvious, was to ascertain how the stones would withstand the effects of an atmosphere and its rainfall made acid through absorbed carbonic acid. To make the results appreciable within a reasonable time, it was of course necessary to exaggerate...
Page 6 - life" of different types of stone was based on observations of buildings and represents the period the stone will endure until disintegration renders it so unsightly in appearance that repair is necessary.
Page 28 - It will be noted that in some instances a stone losing a certain amount still retains a nearly smooth surface and sharp arrises. Others become roughened , granules loosened to the point of falling away, and the arrises, as a consequence, left ragged. In some of the stones there is a tendency for the smaller interstitial crystals to disappear, leaving the largerstanding in relief.
Page 28 - ... material both in weight and in percentage amounts. The first table gives the results of some preliminary tests which were not carried to completion, owing to imperfection of apparatus. They are, however, included here, since so far as they go they are confirmatory of those in the second . The results of both cases agree surprisingly well.
Page 29 - The considerable amount of insoluble material set free from these oolitic cubes during the trial setting to the bottom of the jar as mud or remaining to be brushed off the surface when the cube was dried seems to have come wholly from the oolites, and not from the interstices. It will be noted, as might have been expected, that the dolomitic marbles...
Page 51 - True Specific Gravity, Apparent Specific Gravity, Porosity, and Weight per Cubic Foot True specific gravity Apparent specific gravity Weight per cubic hut Ref.