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A, et al. Synthesis of NaYF 4 :Yb,Er@SiO 2 @Ag coreshell nanoparticles for plasmon-enhanced upconversion luminescence in bio-applications.

The article discusses the problem of increasing the water resistance and strength of a composite gypsum binder for concrete. The effect of complex modification of a composite gypsum binder with a micro-reinforcing, polymineral micropuzzolanic additive filler and superplasticizer from Sika was investigated. The use of filler additives in optimal ratios made it possible to obtain a composite gypsum binder with a softening coefficient of 0.9.

Arbolit concrete, as one of the types of light modern concretes, is a complex composite of a combination of different materials: a binder component, additives and cellulose aggregate. Wall blocks, panels, slabs, etc. are manufactured from arbolit concrete for the construction of low-rise residential, public, industrial and agricultural buildings. According to the properties, arbolit concrete is closest to the tree (organic aggregate is more than 85% of the volume). Arbolit concrete combines the best qualities of wood and concrete: environmental friendliness and durability of concrete, strength of wood and its vapor resistance. However, cellulosic aggregate has its own specific features that negatively affect the structure formation processes, in particular, the strength and durability of the composition “ organic aggregate - astringent "to moisture-variable effects. Selection of a binder for arbolit concrete is also a difficult task that requires a separate research. Basically, for the manufacture of products made of arbolit concrete portland cement is used, abroad - lime binder. The disadvantage of cement concrete on cement, lime and lime containing a binder is a relatively long period of gain of brand strength. A promising direction for solving this problem is the use of composite gypsum binder for the production of concrete. Based on the above, we can conclude that the design of low-density arbolitbeton formulations on a composite gypsum binder is an urgent task [1].

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