Based on extensive literatures, the bearing capacity of multi floor brick house is evaluated scientifically by adopting pulsating method and vibration inverse problem theory, and the relation between dynamic parameter and mean strength of bricking up is verified.

Results show that the average compressive strength of the calcium phosphate cement samples soaked in simulated body fluid (SBF) for 3 d is (103.9±4.7) MPa, and the maximum value reaches to 115 MPa. The values approaches to the compressive strength of human long bone (106—133 MPa), which provides the possibility to (repair) the load-bearing bones by calcium phosphate cement(CPC) for human body.

The average compressive strength of products in pilot test can be up to 18.9 MPa, and other properties all meet the demands of the standards of GB5101-2003 and GB6566-2001.

The average compressive strength of pilot test products can be up to 18.9 MPa and the other properties all meet the requirement of GB5101-2003 and GB6566-2001.

Firstly, under triaxial compression,average compressive strength formula of concrete will be proposed in the central part of SRC beam-column jionts will be proposed in this paper.

Experiment observed that the mean compressive strength and tensile strength of the pre-contraction cement sand grout comes respectively up to 32.86 Mpa and 2.58 Mpa. The results show its strength exceeds general concrete, and it is a perfect material to mend concrete defect.

σ±4.19 MPa. The strength ratio of tension to complession is 1/9. The modulus of elastic compression is 27. 17×103 MPa. The average saturated density is 2475 kg/m3. Water absorptivity is 3. 68 percent.

The strength values of three sections are of little discreteness. The average compression strength in different section is 43.2,44.3 and 44.2 MPa respectively; the flexural strength is 5.7,5.9 and 5.9 MPa correspondingly.

The foam ceramic is prepared with kaolinite, bauxite and talc by the polymeric sponge impregnation process. The ceramic foam is composed of cordierite, MgSiO 3 and glass. Its compression strength is estimated to be 0.98 MPa, the porosity 81.7%～87.6%, the density 0.310～0.447 g/cm 3 and the pore size 0.2～0.5 mm.

We show that, within the error limits, the mean strength of the photospheric magnetic field H (of its longitudinal component, in magnitude) has not changed over the last 32 years.

The magnetic-field strengths in the central regions of these galactic nuclei, on scales of ～0.1 pc, exceed the mean strength by four to five orders of magnitude, and lie in the range 102 G >amp;lt; H >amp;lt; 104 G.

The results show signals of the ENSO phases both in the mean strength of the NAO as well as in its internal variability.

In the circumferential direction the tissue was more extensible and had greater mean strength (18 MPa against 2·5 MPa) and mean terminal modulus (46 MPa against 14 MPa) than in the root-to-apex direction.

higher mean strength value for samples having finer grain size; the fatigue strength of a rock also shows a converse relation with mean uniaxial compressive strength.

The concrete had an average compressive strength of 61.76 N/mm2.

The combining of fibers, often called hybridization, is investigated in this paper for a very high strength matrix of an average compressive strength of 85 MPa.

The experimentally obtained average compressive strength of concrete was 30?MPa.

The best material has an average compressive strength of 917 MN m-2 (133×103 psi), and polished samples have an average tensile strength of 196 MN m-2 (28.4×103 psi).

The best material has an average compressive strength of 917 MN m-2 (133×103 psi), and polished samples have an average tensile strength of 196 MN m-2 (28.4×103 psi).

They have following characteristics: excellent mechanical properties (mean compressive strength is 206.

The mean compressive strength of boards (1.3-22.0 N/mm2) also decreased with decreasing board density.

Porous bioceramics with high porosity for bone tissue engineering were fabricated by the foam impregnation technique, but their mechanical strength was poor, only a mean compressive strength of 1.04 ± 0.15 MPa and an mean elastic modulus of 0.1 GPa.

It was found that the mean compressive strength value and the mean elastic modulus value of porous samples coated with gelatin were improved to 5.17 ± 0.17 MPa and 0.3 GPa respectively without sacrificing their porosity greatly.

Tests carried out on 200-mm-long steel tubes subjected to axial compression gave a mean compressive strength of 250 MPa.

B, B+N, Y, Ce and rare-earth mixture (0.1—0.2％)were added respectively to the catalytic alloys Ni_(40) Mn_(30) Fe_(30). Experimental results indicate that the oxidation resistance of the diamonds increased greatly, and the mean compressive strength slightly, by the catalytic alloy containing boron (or boron and nitrogen). This catalyst may be widely applied to the synthesis of dark diamonds containing boron. As for rare-earth elements, there are some influences too.Samples of catalytic alloys containing and...

B, B+N, Y, Ce and rare-earth mixture (0.1—0.2％)were added respectively to the catalytic alloys Ni_(40) Mn_(30) Fe_(30). Experimental results indicate that the oxidation resistance of the diamonds increased greatly, and the mean compressive strength slightly, by the catalytic alloy containing boron (or boron and nitrogen). This catalyst may be widely applied to the synthesis of dark diamonds containing boron. As for rare-earth elements, there are some influences too.Samples of catalytic alloys containing and non-containing small amount elements were assembled half and half symmetrically in a reaction vessel to set up the horizontal concentration gradient of small-amount doping atoms. The influences of small-amount elements such as boron upon the synthesis of diamonds under high-pressure and high-temperature were investigated, thus obtaining some useful results.

The properties of Yantan dam RCC, stasties of quality test and the results of the concrete interlayer clear test of site specimen are summarized. Yantan dam is 110m heigh, and with 370000 m3 rollercompacted concrete (RCC) in total. The materials used in the RCC are calcareous rock crushed sand and stones. The maximum grain size of aggregate used is 80mm. The contents of cement, fly ash and the rock powder as fine aggregate are 55kg/m3, 105 kg/m3, 94 kg/m3 respectively. The ratio of water to cementitious material...

The properties of Yantan dam RCC, stasties of quality test and the results of the concrete interlayer clear test of site specimen are summarized. Yantan dam is 110m heigh, and with 370000 m3 rollercompacted concrete (RCC) in total. The materials used in the RCC are calcareous rock crushed sand and stones. The maximum grain size of aggregate used is 80mm. The contents of cement, fly ash and the rock powder as fine aggregate are 55kg/m3, 105 kg/m3, 94 kg/m3 respectively. The ratio of water to cementitious material is 0. 54. The average compassion strength of the core samples from RCC dam is 25. 3 MPa. σ±4.19 MPa.The strength ratio of tension to complession is 1/9. The modulus of elastic compression is 27. 17×103 MPa.The average saturated density is 2475 kg/m3. Water absorptivity is 3. 68 percent.

The mechanial characters of rock joint surfaces are analyzed at first. Some methods of determining JRC of rock joint are presented and some problems existing in thesemethod also pointed out. The computing JRC method with fuzzy mathematics taking themean rebound number from Schmidt hammer. mean joint compressive strength. averageaperture and joint roughness amplitude as the basic factors is finally put forward. Themethod is simple and feasible.