In order to realize long-distance, long-term and on-line cable tension monitoring of suspension bridges, a novel sensor has been designed based on Fiber Bragg Grating (FBG) sensing technique, which comprises of fixtures of the sensor as well as FBG, micro-spring and epoxy resin made large gauge sensing element. Further, following the calibration test for the designed FBG sensor, research on the calibrated sensor for monitoring the cable tension was carried out, whose result shows that, featured by the simplicity of operation and the accurate monitoring data, the designed FBG sensor is capable of monitoring the cable tension of built suspension bridges.

Because of its poor pozzolan property in tests, the pumice was unsuitable to be used as the cement admixture, which could reduce the compressive strength greatly. In the experiment, the cement，replaced with several ratios of pumice，was stimulated by the different content of mixed solution with sodium silicate and KF. The compressive strength results and the SEM morphologies showed that mixed solutions can display excellent alkali-activated effects on pumice.

The portland cement clinker was successfully produced using pumice as the principal materials. Effects of different calcine temperature on cement clinker were studied. Phase compositions of clinker were confirmed by combining the phase diagram with X-ray diffraction. Microstructures of clinker were analyzed by scanning electron microscope. From the result of mechanical property showed that the compression strength of clinker can be reached 35MPa. The result of scanning electron microscope showed that the main hydrating products were CSH gels, AFt and CH crystals, the morphology of which were normal. With the prolongation of hydrating age, the hydrating products were richer and the cement paste was densified.

Pumice is a kind of natural lightweight aggregate with well-developed porosity and moderate-intensity. Amorphous Si-Al oxide is its main mineral composition. This paper focused on the performance and features of the pumice pozzolan and aggregate firstly. Then a kind of pumice concretes was prepared with the ordinary Portland cement, ordinary sand and strengthened coarse pumice aggregates. And its mechanical properties, durability, insulation and absorbing performance were investigated. The result showed that the compressive strength of pumice concrete was 20MPa, anti-freezing durability was more than 100 freeze-thaw cycles, electric flux within 6 hours was 1749C, thermal conductivity coefficient was 0.318W/ mK, and the electromagnetic wave absorption was-5dB ranging from 8 to 18GHz. The results indicated that the pumice concrete could be developed as the green and multi-functional concrete materials in the future.

Wave-absorbing properties of ordinary concrete and pumice lightweight aggregate concrete which contained expanded perlite and carbon black were investigated in this paper. The results indicated that pumice lightweight aggregate concrete had ideal wave-absorbing properties. Within the scope of 2 ~ 18 GHz, the lowest reflectivity reached to -20 dB and better than the bandwidth of -5 dB up to 9 GHz. Meanwhile, the incorporation of proper carbon black absorber and expansion perlite can improve wave-absorbing properties.