| Inorganic embedded adhesive is a kind of compounds with high strength,micro-expansion and other characteristics, including major material-high performance cement and certain percentage of mixing mineral additives. Inorganic embedded adhesive can be used in the foundation strengthening where the water exists and other humid environment, and is provided with better durability, fire resistance and economy and so on. In the masonry strengthening, strengthening with High Performance Ferrocement Laminate is an economic, effective method with wide application. In this method inorganic embedded, instead of the traditional link bar which penetrates the masonry wall, can solve the anchoring problem of single plane strengthening of masonry wall and complex construction. Previous study has focused on embedded in the concrete, but there is no study about embedded in the masonry. In this article the experimental study about pull-out and shear properties in the masonry is taken, mainly the following:(1) A new inorganic embedded adhesive mix is proposed based on the traditional inorganic embedded adhesive which is mainly composed by high performance cement and superfine mineral additives. A kind of superfine quartz sand is taken into the new adhesive, and forms a ternary mixture of good grading in the size. The inorganic embedded adhesive is proved to be reliable by material test and pull-out experiment in the concrete.(2) The strength levels of masonry mortar and the depth of the anchorage are considered in the pull-out test. The major form of damage in the pull-out test is cone damage of the masonry, and the tensile strength of specimen increases gradually with the addition of depth of the anchorage. Construction process is critical to ensure the quality of anchorage in the masonry, so it is needed to wet the masonry before anchoring of the masonry, but in the surface of the masonry water isn't allowed apparently.(3) 16 shear specimens including embedded bar parameter through the masonry-mortar bonding surface,different embedded depth and the method of interface finishing are tested in the paper. Test results indicate that there is an independent increase between the area of embedded bar and the shear strength, and the maximum increase rate of the shear strength is 38.5%. Depth of the anchorage is also the main factor to affect the shear strength and failure mode, and when the bar bears the shear stress, the minimum anchorage depth of masonry shall be taken by 10d. Because of the material properties of masonry and feasibility issues of construction, interface agents have a negative impact on the shear strength, so it is suggested that interface agents should not be used in masonry strengthening.(4) The finite element software-ANSYS is applied to simulate the properties of the shear specimens, and the slip between the masonry and the composite mortar and the pin are considered in the analysis. The results of the stress distribution and the crack distribution of composite mortar layer for embedded specimen and no-embedded specimen agree well with the experimental results. The stress of bonding surface is redistubited because of the pin, which also restricts the slip of the bonding surface, and increases the ultimate shear capacity.(5) Based on the shear strength of reinforced of Mattock, the formula of the shear strength of brick-mortar bonding surface is fitted by the experimental results and analysis, and is well agreed with the experimental dates. The construction requirements are proposed in the masonry in view of experimental and theoretical calculation.
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