THE EFFECT OF SULPHUR COMPOUNDS ON CEMENT . 
By J. C. Witr 
Formerly of the Bureau of Science, Manila 
Some papers on the effect of sodium sulphide and the effect 
of calcium sulphate? on cement were published by me several 
TABLE 1.—The effect of sodium sulphide on tensile strength. 
[Pounds per square inch. Each value is the average of six tests.] 
NEAT. 
Sulphur, : a g s 3 2 = g z Fd 
Cement. grams per| @ Si 8i3j,21% Fy E $ | § 
ect wii ei a1 Si 2) & | el 2 
A (a) 353 | 595 | 685/ 673| 688| 711] 688| 662! 576 | 650 
A 0.097 | 307] 586 | 642] 606] 594| 696] 757/| 610! 530| 528 
A 0.97 | 300] 506/ 548| 542] 635] 660] 6es| 661| 571 | 675 
Pe Se 4.80 | 155] 300] 573| 560] 555] 615| 617| 557] 305 | 527 
A. P 9.70 | 190| 268| 391] 406] 477| 488] 528/ 530/| 528 | 445 
B- (a) 837} 617| 651| 649| 586] 621| 636| 591| 411 | 457 
B 0.097 | 411} 622/ 611] 618} 605| 573| 573| 597| 501 | 565 
B 0.97 | 388] 579/ 599] 581| 547] 601] 580! 567| 475 | 587 
8S ee 4.80 | 340] 475) 567| 569| 564] 542] 543| 466| 454 | 454 
. 2 Se eae 9.70 | 262] 460} 495] 526] 417| 457| 446| 475] 365 | 397 
c ‘ (a) 330 | 586| 679| 644| 686] 680| 695| 644| 558 | 653 
_ AN aan s 0.097 | 412| 577. 666 | 652] 681| 608| 613} 554 | 675 
c a ee 0.97 | 407| 568| 605| 676+ 563| 652/| 602! 595| 565 | 657 
C.. 4.80 | 355| 461| 452| 503| 601| 625] 630| 622| 472 | 590 
SERS ie Pe ee 9.70 | 841] 438) 410] 400| 582] 572| 597| 552| B40 | 42 
tava: ais: (a) 848 | 633 | 722] 677] 710] 695] 692| 617| 529! 546 
et Ae Sa 0.097 | 835| 687| 726] 685| 716| 725| 698! 702| 670 | 630 
PO Rapa de saan 0.97 | 308) 564| 655) 642| 712! 788) 717} 642| 560 | 648 
Wi 8 ge 4.80 | 214] 467/ 630) 581| 631| 599| 717| 616| 598 | 577 
Bis gs hear eae, 9.70 | 255] 553| 584] 584] 536| 595] 571| 563] 502 | 446 
| Se, (3) 888 | 628 731} 720| 706| 677| 706| 685! 559 | 597 
S22 Sea 0.097 | 334| 638/ 736| 676] 721| 686| 738| 649| 647 | 698 
Geos ee an 0.97 | 840| 609} 645 | 604| 666| 665/ 636| 642/| 564 | 592 
E., 4.80 | 222] 456/ 588| 589] 633] 630] 518| 576/ 515/550” 
Ee 9.70 | 268/ 519| 589| 516] 506| 489] 517! 5e0| 506 | 447 
: _@ Water. 
* The effect of sulphide on cement, Philip. Journ. Sci. § A 11 (1916) 273. 
The work suggested a later paper: The action of sodium sulphide on 
ferric oxide, Journ. Am. Chem. Soc. 43 (1921) 7384. 
* The effect of calcium sulphate on cement, first paper, Philip. Journ. 
Sci. § A 12 (1917) 183; second paper, Philip. Journ. Sci. 14 (1919) 221; 
Concrete 16 (1920) 82, 
357 
