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分析了萘系减水剂及苯丙乳液的加料顺序对乳液改性砂浆性能的影响.结果表明:未掺减水剂和等水灰比条件下,乳液改性砂浆的抗折、抗压强度均低于未掺乳液的对比砂浆;在等流动度条件下,掺减水剂的乳液改性砂浆除同掺法7 d外,3 d后各龄期抗折强度均高于未掺乳液的对比试样;无论是否掺加减水剂,同掺法乳液改性砂浆7 d抗折、抗压强度均较后掺法低,而其28 d抗折、抗压强度则较高;后掺法的掺减水剂乳液改性砂浆黏结强度小于同掺法;而对于未掺减水剂的情况,两种掺加方式下乳液改性砂浆28 d黏结强度基本没有差别.总而言之,同掺法工艺更简单,且所得砂浆的28 d力学性能更好.
The influence of the addition sequence of naphthalene superplasticizer and styrene-acrylic emulsion on the properties of emulsion-modified mortar was analyzed.The results showed that the flexural strength, compressive strength Under the condition of equal fluidity, the flexural strength of emulsion-modified mortar with water-reducing admixture was higher than that of non-mixed emulsion Compared with the latter, the flexural strength and compressive strength of the mortar modified with doping method were both lower than that of the latter, and the flexural strength and compressive strength of the mortar were higher than that of the latter at 7 d, The water-modified mortar modified mortar modified mortar bond strength is less than the same method; and for the case of non-doped water-reducing agent, the two modifiers mortar modified mortar 28 d bond strength is basically no difference.In conclusion, The process is simpler, and the mechanical properties of the obtained mortar for 28 d are better.