The elastic properties of concrete under bi-axial loading . II. liATERlALS, TEST PIECES AND APPARATUS. 4. Materials and Their The cement used was furnished by the Universal Portland Cemen t Co. Tes ts of samples talc en at times during the s eason v-ere made in the Cement Testing; Laboratory and are given in Table I. The tests were made by B. L. Bowling. Table I • BRIQUETTE TESTS OF Each value is the average from five oes ts. Lo ads are given in pounds per square inch. Sample Date Neat Cement 1-3 liortar llo. 7 Days 28 Days 7 Days ido ijays 1 Oct. 25, 1911 5
The elastic properties of concrete under bi-axial loading . II. liATERlALS, TEST PIECES AND APPARATUS. 4. Materials and Their The cement used was furnished by the Universal Portland Cemen t Co. Tes ts of samples talc en at times during the s eason v-ere made in the Cement Testing; Laboratory and are given in Table I. The tests were made by B. L. Bowling. Table I • BRIQUETTE TESTS OF Each value is the average from five oes ts. Lo ads are given in pounds per square inch. Sample Date Neat Cement 1-3 liortar llo. 7 Days 28 Days 7 Days ido ijays 1 Oct. 25, 1911 585 685 239 315 2 IIov. 11, 1911 577 694 225 297 »-> Dec. 7, 1911 691 715 242 306 4 Dec. 22, 1911 617 792 231 326 5 Jan. 10, 1912 588 672 246 6 Feb. 12, 1912 512 758 253 7 Feb. 20, 1912 698 884 287 372 Avers 624 743 246 325 Additional tests on this cemen* , showed the initial set to occur after 3-hr, S-min. and final set after 6-hr. 32-11 lin. Sieve tests sh07;ed per cent passing a ITo . 100 sieve and per cent passing a IJo. 200 sieve. 16. 17 Saiid. j-lie sand used vras torpedo sand Iron Attica, Indiana. It was of good quality, fairly sharp, clean and v/ell {graded as shown by the mechanical analysis given in Table II. It combinedcoarse with the^a£,i;recates used in a very satisf?.ctory manner. It wasfrom the same locality and of the same quality as the sandused in malcin^^ the concrete and reinforced concrete testspecimens for several years at he University of Illinois. Table A1>IALY3IS OF SAITD - 1912Average of 5 Samples Sieve ITo. SeparationSize,in. Per CentPassing 51012161830405074150 . •1 -T- Stone. A good quality of rather hard limestone from KarJcalcee,Illinois, specified to pass through a 1-in. ring and over ascreen with l/4-in. meshes, was used. A mechanical analysisof the stone has been made and the results are shOYm in Table IIIThe stone is representative of t
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