ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18000.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18001.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18002.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18004.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTConstruction problems due to lack of coördination in sizes of different masonry materials are pointed out. It is proposed that these difficulties can be overcome by adoption of a standard “unit” of dimension to be used by architects and engineers in dimensioning building plans, and by masonry material manufacturers in determining the size of their products. No definite “unit” of measure is suggested, except that it should approximate one brick length plus one mortar joint, two brick widths plus two joints, or three brick thicknesses plus three joints. The application of the “unit” plan is given for face brick, common brick, paving block, fire brick, cement block, structural clay tile, terra cotta, cut stone, and to masonry openings for windows and doors. Illustrated with 74 photographs of masonry

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18005.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTThis is a progress report of an extensive study of fire clays and fireclay brick. It includes the results of a preliminary study of clays representative of those used in the manufacture of refractories throughout the United States. Chemical analyses and a summary of physical tests are given of both fire clays and the brick manufactured from them. The thermal expansion behavior of the fire clays fired at 1400°C and those of the fire brick “as received” from the manufacturer and also after firing at 1400°C, 1500°C, and 1600°C were studied and the materials classified into groups having characteristic thermal expansions. The moduli of elasticity and rupture were determined at 20°C, 550°C, and 1000°C. The resistance of the brick to spalling in a water‐quenching test is expressed in an empirical relation correlating the elasticity, strength, coefficient of expansion, and percentage of grog used in compounding the brick batches. Data are presented on individual bricks made by the same manufacturer showing probable reasons for great differences in the number of quenchings required to cause spalling in the wa

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18006.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTTests were made with the plastic and semiflint fire clays of north central Missouri and the burley diaspore of south central Missouri. Aging plastic fire clay ten days produces about a 38% increase in modulus of rupture. Na2CO3treatment produces about a 50% increase. Tannic acid which flocculates the colloids improved the modulus a good deal; an acid treatment after an alkali treatment, however, produced no added effect of importance. The effect of developing bacterial growth was marked, especially if aged for a considerable time. The addition of bentonite Collotone R increased the modulus almost 3 times. The maximum is reached with about 8% bentonite. The additive effect of dextrine in combination with bentonite is positive but of negligible consequence. Tennessee ball clay is without important positive effect in amounts up to 8%.Sodium silicate additions up to 8% gave negative results.With as little as 4% bentonite the modulus of rupture of flint clay is tripled. Aging of flint clay has an important positive effect. Effect of the bentonite can be obtained in the dry‐press, stiff‐mud, or soft‐mud bodies, but it is greatest in the stiff‐mud.Burley clay is less self‐bonding than the flint and the effect of the bentonite was more marked even than in the case of flint. Four per cent bentonite increased the modulus of rupture to about 4 1/2 times its original modulus of rupture.The modulus of rupture of flintclay‐bentonite mixtures might approach that of plastic fireclay‐bentonite mixtures at high contents of bentonite, leading to the indication that in the case of these two clays the total colloidal content is the determining factor.With 3% bentonite the modulus of rupture of the flint is made equal to that of the plastic and straight, a result applicable to problems where the dissolving out of the bonding material in the refractory is a determining factor in service. The P.C.E. of the plastic fire clay drops 1 cone for 3% and 2 cones for 6% of bento

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18007.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

摘要:

ABSTRACTSink‐hole type deposits filled with flint fire clay have been known in the Ozark region of Missouri for many years. Within the last ten years, an associated clay, formerly discarded as waste, but now recognized as diaspore clay has been developed. The paper outlines the general geology of the district and discusses the clays and mode of occurrence of the deposits, Brief mention is made regarding future production and probable developments in this interesting distric

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18008.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1929.tb18009.x

出版商:Blackwell Publishing Ltd    

年代:1929

数据来源: WILEY