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Fungicides Performance Impact
Jul 10, 2017

Through the refrigerator sealed, sealed at room temperature, Fungicides sealed exposure, exposure exposure four kinds of storage conditions simulation project site, to explore the impact of fungicides on the performance of polycarboxylate superplasticizer and its deterioration reasons. Fungicides The results showed that there was a significant degree of turbidity in the water-reducing agent without adding fungicides, especially under normal temperature and sealing conditions, and the condensation time was shortened, Fungicides but the storage environment had a better effect on the fluidity and the loss of water And the two kinds of fungicides have good anti-corrosion effect, the water-reducing agent of the water, Paul collapse, retardation, appearance and other small impact, Fungicides but not in the outdoor exposure and exposure conditions, and through the GPC Proved polycarboxylate water-reducing agent is due to deterioration of the carbohydrate retarder caused by microbial decomposition.

The water reducing agent is one of the essential components of modern cement concrete. Fungicides Compared with other types of water-reducing agent, polycarboxylate water-reducing agent has the advantages of small dosage, high water-reducing rate, strong plasticizing function and environment friendliness, Fungicides and the engineering application is more extensive. However, due to the range of pH value of the polycarboxylate superplasticizer itself and the organic matter contained in the environment for the propagation of microbial metabolism, there are usually discoloration, moldy, odor and other phenomena in the transportation and storage process. Product performance. Fungicides At present, the use of organic acids and their esters, mud esters, halogen, formaldehyde and formaldehyde slow release as a fungicide, Fungicides the impact of the performance of the water reducing agent reported very few. In this paper, Fungicides two kinds of low toxicity and non - irritating fungicides were used to study the effect of polycarboxylate superplasticizer on the appearance and properties of polycarboxylate superplasticizer under different storage environments.

Cement: Anhui Conch Cement Co., Fungicides Ltd. production of P · O42.5 cement, density 3.10g / cm3, the standard consistency of water consumption 27.1%, fineness of 3.2%.

Water-reducing agent: Jiangsu SuBote new materials Co., Ltd. Fungicides production of PCA-I ether polycarboxylate high performance water-reducing agent, and composite collapse, retardation and other components, Fungicides the density of 1.06g / cm3, pH 6.8, Alkali content of 0.3%, water reduction rate of 28.5%.

Fungicide: Jiangsu Province, Fungicides a company's broad-spectrum, high efficiency, Fungicides low toxicity of bacteria, can effectively inhibit the growth and reproduction of bacteria and fungi organic solvents, and organic and inorganic ingredients have excellent compatibility.

The prepared polycarboxylate water-reducing agent and the water-reducing agent with 1 kg / t of fungicide A or B were put into a transparent PET plastic bottle, Fungicides sealed in the refrigerator at low temperature (5 ℃), sealed in the room, Outdoor exposure exposure conditions for a certain period of time to carry out sampling test.

Under different storage environments, Fungicides the appearance of polycarboxylate water-reducing agent varies, as shown in Figure 2-5. In the case of adding a fungicide, the appearance of the polycarboxylate water-reducing agent stored for 90 days in the sealed or sealed atmosphere is equivalent to that of the new sample, Fungicides and no significant change has occurred. And did not add fungicides in the polycarboxylate water-reducing agents are turbid, especially in the indoor sealing conditions, the water-reducing agent has a serious odor, severe deterioration.

Outdoor sealed exposure, no fungicide and fungicide B of the water-reducing agent turbidity, especially fungicide B water-reducing agent turbidity is more serious, some scholars believe that the fungicide in the high temperature, light irradiation, prone to reduce, weaken its Bactericidal effect. Fungicides Outdoor exposure exposure, the addition of fungicide water reducer are bacteria, Fungicides color deepening, may be related to debris fall. Did not add fungicide water reducing agent at the bottom of the precipitation, Fungicides showing a transparent, but the outdoor storage are odor smell phenomenon.