Briefly curtain wall dry hanging stone comprehensive performance testing method

stone is a natural product, each kind of stone material is unique, has its own peculiar phychemical properties.

1, stone performance indicators

Stone exposed to in air, after weathering, its strength will happen, some of stone material strength attenuation even attenuation 70%. If the performance of the design on the stone, will not fully grasp the safe use of great give buildings hidden trouble. To effectively control the dry hanging stone facade with safety, must be a comprehensive grasp of stone marble performance, which requires formulation of a comprehensive stone testing program.

This paper reference and stone material test relevant Chinese GB, ASTM, Europe EN Sandstone, dry hanging stone introduced main performance indexes, including stone's resistance to compression strength, flexural strength, volume density and bibulous rate, fight salting-out test, rupture modulus, freeze-thaw cycle test and lithofacies analysis and corresponding test method.

2, stone the test method

2.1 compression strength

Stone compression strength is according to GB/China T9966.1-2001 natural finishes stone test methods part 1: dry, water saturation, freeze-thaw cycle compression strength test method "certain. This experiment specimen size: the cube or Φ side 50 x 50 cylinder, 50 in the experiment on the loading of specimen. Until the damage The compression strength for stone specimen by the maximum load applied by jose area specimens. Through experiment showed that on the stone in wet conditions stone the compression strength and dry conditions by jose different, stone material parallel to texture the compression strength and direction when direction perpendicular to the texture is different also, stone freeze-thaw cycles of compressed strength after can change, all kinds of depends on stone. Therefore, the compression strength in stone should be all the five kinds of state: wet and dry by Dutch, parallel to the texture with perpendicular to the direction, stone freeze-thaw cycle of compression strength after.

2.2 bending strength

Bending strength is used in a stone structure calculation of controlling index, it directly affects the thickness of dry-hanging stone material selection and fixed system identified. Stone bending strength is according to GB/China T9966.2-2001 natural finishes stone test methods section 2: dry, water saturation bending strength test method of "decided. This test is a stone plate from the stone cut take four locations multi-group loading, gradually increasing load specimens damage, record until the infliction of maximum load and calculation of the bending stress specimens and destroyed. Of 4 kinds of test status (wet and dry; be parallel to the Idaho direction perpendicular to the stone texture with any one of the direction), repeat 5 times such tests.

GB/T9966.2-2001 allows testing according to actual situation of stone material thickness affirmatory. When sample thickness (H) 68mm acuities 100mm; when the width to When 68mm > when specimens thickness for 1.5h width. The two specimens, request force face should level off and parallel. Specimen may not have crack, lack of edges and missing Angle. A lot of testing data show that the GB/T9966.2-2001 measurement bending strength can well represent the entire block dry hanging stone plate bending strength.

Stone is a natural product, each kind of stone material is unique, has its own peculiar phychemical properties.

1, stone performance indicators

Stone exposed to in air, after weathering, its strength will happen, some of stone material strength attenuation even attenuation 70%. If the performance of the design on the stone, will not fully grasp the safe use of great give buildings hidden trouble. To effectively control the dry hanging stone facade with safety, must be a comprehensive grasp of stone material performance, which requires formulation of a comprehensive stone testing program.

This paper reference and stone material test relevant Chinese GB, ASTM, Europe EN standards, dry hanging stone introduced main performance indexes, including stone's resistance to compression strength, flexural strength, volume density and bibulous rate, fight salting-out test, rupture modulus, freeze-thaw cycle test and lithofacies analysis and corresponding test method.

2, stone the test method

2.1 compression strength

Stone compression strength is according to GB/China T9966.1-2001 natural finishes stone test methods part 1: dry, water saturation, freeze-thaw cycle compression strength test method "certain. This experiment specimen size: the cube or Φ side 50 x 50 cylinder, 50 in the experiment on the loading of specimen. Until the damage The compression strength for stone specimen by the maximum load applied by jose area specimens. Through experiment showed that on the stone in wet conditions stone the compression strength and dry conditions by jose different, stone material parallel to texture the compression strength and direction when direction perpendicular to the texture is different also, stone freeze-thaw cycles of compressed strength after can change, all kinds of depends on stone. Therefore, the compression strength in stone should be all the five kinds of state: wet and dry by Dutch, parallel to the texture with perpendicular to the direction, stone freeze-thaw cycle of compression strength after.

2.2 bending strength

Bending strength is used in a stone structure calculation of controlling index, it directly affects the thickness of dry-hanging stone material selection and fixed system identified. Stone bending strength is according to GB/China T9966.2-2001 natural finishes stone test methods section 2: dry, water saturation bending strength test method of "decided. This test is a stone plate from the stone cut take four locations multi-group loading, gradually increasing load specimens damage, record until the infliction of maximum load and calculation of the bending stress specimens and destroyed. Of 4 kinds of test status (wet and dry; be parallel to the Idaho direction perpendicular to the stone texture with any one of the direction), repeat 5 times such tests.

GB/T9966.2-2001 allows testing according to actual situation of stone material thickness affirmatory. When sample thickness (H) 68mm acuities 100mm; when the width to When 68mm > when specimens thickness for 1.5h width. The two forces specimens, requirements and flat surface should level off