Author: Cyrus Charles Fishburn
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 56
Book Description
The physical properties of mortars, the bond strength of the mortars to masonry units, and the structural strength of concrete masonry and composite masonry walls containing the mortars are discussed and compared. All of the mortars were tempered to as wet a consistency as could be conveniently handled by the mason. The compressive strength of the walls increased, in general, with the compressive strength of the mortar. The racking and flexural strengths of the walls increased with the bond strength of the mortar. The strength of bond test specimens tended to increase with the compressive strength of the wet consistency mortars that were used. However, bond strength appeared to be the dominant factor affecting the racking and flexural strength of the walls. Increase in both bond strength and wall strength with compressive strength of the mortar was not proportional to the relative compressive strengths of the type N and type S mortars. The stiffness of walls subjected to compressive and flexural loads increased with the bond and compressive strength of the mortars. However, the stiffness of walls subjected to flexural loads appeared to be more dependent upon the number of bed joints in the tensile face and on their extension in bond than upon the bending strains in the masonry materials.
Effect of Mortar Properties on Strength of Masonry
Author: Cyrus Charles Fishburn
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 56
Book Description
The physical properties of mortars, the bond strength of the mortars to masonry units, and the structural strength of concrete masonry and composite masonry walls containing the mortars are discussed and compared. All of the mortars were tempered to as wet a consistency as could be conveniently handled by the mason. The compressive strength of the walls increased, in general, with the compressive strength of the mortar. The racking and flexural strengths of the walls increased with the bond strength of the mortar. The strength of bond test specimens tended to increase with the compressive strength of the wet consistency mortars that were used. However, bond strength appeared to be the dominant factor affecting the racking and flexural strength of the walls. Increase in both bond strength and wall strength with compressive strength of the mortar was not proportional to the relative compressive strengths of the type N and type S mortars. The stiffness of walls subjected to compressive and flexural loads increased with the bond and compressive strength of the mortars. However, the stiffness of walls subjected to flexural loads appeared to be more dependent upon the number of bed joints in the tensile face and on their extension in bond than upon the bending strains in the masonry materials.
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 56
Book Description
The physical properties of mortars, the bond strength of the mortars to masonry units, and the structural strength of concrete masonry and composite masonry walls containing the mortars are discussed and compared. All of the mortars were tempered to as wet a consistency as could be conveniently handled by the mason. The compressive strength of the walls increased, in general, with the compressive strength of the mortar. The racking and flexural strengths of the walls increased with the bond strength of the mortar. The strength of bond test specimens tended to increase with the compressive strength of the wet consistency mortars that were used. However, bond strength appeared to be the dominant factor affecting the racking and flexural strength of the walls. Increase in both bond strength and wall strength with compressive strength of the mortar was not proportional to the relative compressive strengths of the type N and type S mortars. The stiffness of walls subjected to compressive and flexural loads increased with the bond and compressive strength of the mortars. However, the stiffness of walls subjected to flexural loads appeared to be more dependent upon the number of bed joints in the tensile face and on their extension in bond than upon the bending strains in the masonry materials.
EFFECT OF MORTAR PROPERTIES ON STRENGTH OF MASONRY.
Effect of mortar properties on strength of masonry
Author: Cyrus Charles Fishburn
Publisher:
ISBN:
Category :
Languages : fr
Pages : 45
Book Description
Publisher:
ISBN:
Category :
Languages : fr
Pages : 45
Book Description
Effect of mortar properties on strenth of masonry
Effect of Mortar Properties on the Flexural Bond Strength of Masonry
Masonry Structures
Author: Robert G. Drysdale
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 928
Book Description
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 928
Book Description
Masonry Unit-masonry Mortar Interaction
Author: Waterways Experiment Station (U.S.)
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 238
Book Description
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 238
Book Description
The Effect of Mixing Time on the Compressive Strength of Masonry Mortars
Author: J. I. Davison
Publisher: Division of Building Research, National Research Council
ISBN:
Category : Masonry
Languages : en
Pages : 5
Book Description
The lack of quality control measures during the mixing of masonry mortars on construction sites is evident to observers of field practice. Sand and cementitious materials are often measured with a shovel, water by the bucket or with a hose, and only on rare occasions is the mixing time checked. Observations indicate that the length of mixing time usually reflects the demand for mortar at the working site rather than concern for its quality. Fox example, first thing in the morning or just after lunch, when the masons are starting work and all demanding mortar at the same time, the mixing machine is dumped almost as soon as the last materials are added. At the other extreme, in mid-morning or mid-afternoon, when all the mortar boards are full but the supply in the mixer box needs replenishing, the machine may be allowed to run 20 to 30 minutes before being dumped. These observations raise questions about the effect of various mixing times on mortar properties, and a study was undertaken to provide some answers. Water requirement, flow, retentivity, air content and compressive strength were included in the investigation. The latter is one of the major concerns of the masonry contractor and this paper reports the effect of mixing times on it.
Publisher: Division of Building Research, National Research Council
ISBN:
Category : Masonry
Languages : en
Pages : 5
Book Description
The lack of quality control measures during the mixing of masonry mortars on construction sites is evident to observers of field practice. Sand and cementitious materials are often measured with a shovel, water by the bucket or with a hose, and only on rare occasions is the mixing time checked. Observations indicate that the length of mixing time usually reflects the demand for mortar at the working site rather than concern for its quality. Fox example, first thing in the morning or just after lunch, when the masons are starting work and all demanding mortar at the same time, the mixing machine is dumped almost as soon as the last materials are added. At the other extreme, in mid-morning or mid-afternoon, when all the mortar boards are full but the supply in the mixer box needs replenishing, the machine may be allowed to run 20 to 30 minutes before being dumped. These observations raise questions about the effect of various mixing times on mortar properties, and a study was undertaken to provide some answers. Water requirement, flow, retentivity, air content and compressive strength were included in the investigation. The latter is one of the major concerns of the masonry contractor and this paper reports the effect of mixing times on it.
Masonry: Materials, Properties, and Performance
Author: J. G. Borchelt
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 280
Book Description
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 280
Book Description