ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16651.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16652.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16653.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16654.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16655.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16657.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTVolume changes in brick and mortars attending variations in moisture content and temperature have been studied. There were included in the study 21 cements (both Portland and masonry), 7 limes, and 8 makes of brick received from various sections of the United States. The shrinkage of mortars during hardening and the alternate expansion on wetting and shrinkage on drying occurring subsequent to hardening have been measured. Varying the moisture content produced far smaller volume changes in well‐fired brick than in most of the mortars. Underfired brick expanded appreciably on wetting. It is indicated that differential volume changes between brick and mortar caused by variations in moisture content are apt to be greater than those produced by normal temperature variations. Volume changes in hardened mortars were least in the case of straight lime‐sand mort

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16658.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTIt is well known that among terra cotta colored glazes, chromium greens and chrometin pinks are the most susceptible to crazing. This is, no doubt, due to the absence of ZnO from the RO. In an endeavor to introduce into the glaze composition some material of low coefficient of expansion, the natural lithia‐bearing mineral lepidolite was tried with fairly satisfactory result

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16659.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTThe characteristics of glazes are too frequently regarded as the only important factor governing the resistance of glazed ware to thermal shock crazing. In this investigation it was found that thermal shock crazing was caused, in some cases, by craze‐like cracks which developed in the bodies. The importance of selecting suitable bodies, as a means of controlling crazing, became evident at once when it was found that bodies with a high resistance to thermal shock were not so liable to craze when glazed and subjected to sudden temperature changes as those with a low resistance to thermal shock. In general, glazed ware on which the glazes are under fairly high compression are more resistant to thermal shock crazing than those on which the glaze is under either low compression or tension. Glazed ware which is susceptible to thermal shock crazing may be resistant to moisture crazing and vice vers

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16660.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTDown draft is established as best for producing even heat distribution in periodic and chamber kilns. Methods of applying down draft to tunnel kilns are described and illustrated.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16661.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY