JPS60176958A - Resin mortar - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the composition of resin mortar.

[Prior art]

Conventionally, in resin mortars using unsaturated polyester resins, it has been known that the relationship between resin content and strength generally increases as the resin content increases. However, there have been few further studies on the relationship between the composition and strength of resin concrete, and the effect of composition on the degree of weave has not been clarified. For this reason, depending on the resin formulation, the g1 degree may be extremely low, and there are cases where the required strength is not satisfied, which often causes problems in construction.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to obtain a resin mortar with the highest compositional strength.

[Structure of the invention]

The present invention uses an unsaturated polyester resin as a binder and sand and fine calcium carbonate as fillers in a resin mortar with a resin content of 10 to 30% by weight.
%.

The strength of resin mortar is mainly influenced by the resin gold M ratio among composition factors. Figure 1 shows the relationship between resin content and bending strength. As shown in this figure, the bending strength of the resin mortar changes greatly depending on the resin content, and the maximum bending strength can be obtained when the resin content is 10 to 30 weights and t9g. This is due to a difference in the destruction mechanism, and the details will be explained below.

Figure 2 shows the relationship between resin content and air content in resin concrete. As shown in this figure, the resin content is 1
When it becomes 0- or less, the air content increases rapidly. This is because there is not enough t(d fat m:) to completely fill the gaps between the sand and granulated coal into the gaps between the calcium aggregates. A void remains.

This area is designated as (1) and is shown in Figures 1 and 2.

As shown in Figure 441, the strength is significantly reduced in region (I) due to the effect of voids. This is because in the case of concrete, if there are any voids in the concrete, these become the core of cracks and the strength rapidly deteriorates.

On the other hand, as shown in FIG. 2, when the resin content exceeds 30, the air content increases. This impurity is caused by the fact that the amount of resin increases, and during the mixing of the propagation material and resin, air is mixed into the cut-off, which becomes air bubbles and exists in the resin mortar.

This region is referred to as a ship and is illustrated in FIG. 1.As shown in FIG.

However, in the resin content range of 10 to 301%, the air content is almost zero as shown in FIG. 2, and it can be estimated that there are almost no voids in the resin mortar. In this case, the failure of the resin mortar does not occur from the voids, but from the sand, which has the lowest tensile strength among the constituent elements of the resin mortar. Figure 3 shows the relationship between the strain acting on the sand at the time of fracture and the resin content. As shown in this figure, the strain acting on the sand when the resin mortar breaks I is almost constant at 0.02 to 0.04 tf6, and this value coincides with the breaking strain of the sand. It can be assumed that the resin mortar was severely damaged. Furthermore, by observing the fracture surface, it can be seen that this is due to the destruction of the sand rather than the peeling of the interface between the sand and the quartz material, and that the destruction of the resin mortar is caused by the destruction of the sand. In the area of high strength, the fracture occurs not from the voids in the resin mortar but from the mortar elements, and the original strength of the resin mortar can be achieved.

〔Effect of the invention〕

As explained above, MtAUf% of resin mortar
The mechanism differs greatly depending on the resin content, and when the resin content is 10 to 30%, the original strength of resin mortar is reduced.
can be achieved and maximum strength can be demonstrated.

[Brief explanation of drawings]

Figure 1 is a diagram showing the relationship between resin content and bending strength of resin mortar, Figure 2 is a diagram showing the relationship between air content and resin content of resin mortar, and Figure 3 is the fracture strain of sand in resin mortar. It is a figure which shows the relationship between and resin content rate. Figure 2: Fat content / H (%) Figure 2: Fi January (%)

Claims (1)

[Claims] Using unsaturated polyester resin as a binder, jfVt
A resin mortar using sand and fine-grained calcium carbonate as materials, characterized in that the resin content is 10-30%.