【正文】 nt of its rheological properties important parameters. The rheological properties is based on the Bingham rheological model used to evaluate the viseter, and 濰坊學(xué)院本科畢業(yè)設(shè)計(jì)外文文獻(xiàn)及譯文 7 should have a low yield stress and plastic viscosity appropriate. By rheological point of view, vibrationfree matrix of selfpacting concrete is a free flow of ultrafine paste, the paste is made of cement and posed of fine material, the liquid surrounding the solid particles with the thickness of the serosal layer increases with the increase, while the serosal layer thickness of solid particles in the paste has been filled before the gap between the formation, therefore, the thickness of the slurry affects the shapes by solid particles. For the paste, apart from the requirements of high liquidity, the need of sufficient high viscosity, must be a highviscosity Newtonian fluid, in order to prevent segregation. Vibrationfree selfpacting concrete preparation process as shown. Cement ↓ Ultrafine admixture of water superplasticizer ↓ ↓ ↓ The free flow of slurry of fine aggregate ↓ ↓ The free flow of mortar of coarse aggregate ↓ ↓ Selfpacting Concrete Vibrationfree selfpacting concrete mix design, first make sure the gap under the aggregate liquid volume of content needed. The position of the liquid cement, water, additives, and ultrafine material. Super fine materials and the total aggregate volume ratio (S / A) is free of vibration of selfpacting concrete mix design in an important parameter. Zhenming, the mobility of selfpacting concrete will be with the S / A increased with the increase, while the elastic modulus of no significant impact. Basically, according to the required watercement ratio to determine the pressive strength of concrete. Vibrationfree selfpacting concrete due to the rheological behavior of volume and position of the material has a very close relationship, therefore, vibrationfree selfpacting concrete mix design is remended rather than weight ratio of the volume ratio. 濰坊學(xué)院本科畢業(yè)設(shè)計(jì)外文文獻(xiàn)及譯文 8 concrete in terms of performance on the remaining problems and to improve the way Preparation of highperformance concrete is characterized by low watercement ratio, and mixed with a sufficient number of fine mineral admixtures and superplasticizer, so concrete has excellent technical characteristics of an integrated, but this also produced two worthy of attention Performance deficiencies: (1) selfdesiccation caused by autogenous shrinkage。 c, Qingdao, Ningbo Beilun and other ports that can berth 200,000ton class built tankers and ore ships deepwater berths Free Vibration of Selfpacting Concrete Due to vibrationfree selfpacting concrete has a very good work, making the concrete filling, pactness, uniformity has been significantly improved, being a new concrete technology, progress is listed as a family of high performance concrete. Vibrationfree selfpacting concrete is the first study from Japan over the last decade to develop and put into a modern concrete engineering technology. Since vibrationfree selfpacting concrete in engineering applications can be made to improve concrete quality, 濰坊學(xué)院本科畢業(yè)設(shè)計(jì)外文文獻(xiàn)及譯文 6 improve concrete construction operations, to support the construction noise and improve labor productivity, speed up the construction cost reduction and other technical and economic effect, in recent years have given the world great pay attention to. Japan is expected by 2020 there will be 1 / 2 works with the free vibration of concrete selfpacting concrete pouring. As the name suggests, vibrationfree selfpacting concrete is poured concrete, when selfgravity alone without any external force tamping to achieve selfpacting, selfleveling of a concrete. Vibrationfree Selfpacting concrete should have three characteristics: (1) Mobility。s airports cement concrete pavement construction and road pavement engineering is entering a new stage of development to meet the growing demand for aviation and transportation needs. Marine Concrete Structures Durability of hydraulic structures to enhance port study and propose technical and economic rational, easy to promote the use of a new marine engineering highperformance concrete Span bridges, undersea tunnels and offshore oil platforms, is an instance of this application. Such as: a, Shantou, Hong Kong outside the Deepwater Channel Regulation Project。 g. Applications (1) in the . about 70% of the road pavement using highperformance concrete: one in North Dakota, 1988 and 1989 in the summer, with 20200m3 of concrete paving thickness of 200 mm of the surface, its watercement ratio of , cement consumption 100 Kg/m3, fly ash 220 Kg/m3。