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Xile Deep Penetrating Sealer (DPS) ABC
1 Introduction
Deep penetration Sealer ( DPS )is introduced China since the 90s, has succeeded in Zhejiang, Jiangsu, Fujian, Beijing, Shanghai, SichuanChongqing provincescities on roadsbridges, construction house (ground, wall) surface, the basement, water tower, pool , plantworkshop using the cumulative number of 10 million square meters building area, made more significant economicsocial benefits.
Xiamen Xile Waterproof Technology Co., Ltd. has a more systematic discussion about the use of Deep penetration Sealer ( DPS )functionalitydurability, to facilitate the expansion application, now part of the contents are summarized below.
2 Basic properties
2.1Catalyst,
Xile ( DPS )is activated by inorganic silica carrier, catalyst, additives pose a variety of functional groups. Catalyst is to determine the product quality, We develop the Xile DPS has a strong catalyst for catalysis, coupling effects, Waterproofing agent can penetrate quickly the cement mortar, concreteform a waterproof seal silicate gel, After the test (see Table 1)the major technical indicators have reachclose to the levels of catalyst productswaterproofing agent of American.
Table 1 Performance Comparison of catalyst between Xile ( DPS )and American
Performance parameters |
Xile DPS |
American |
Density (23 ± Effective matter content (%) Viscosity (23 ± Surface tension (mN / m) Gel time (min) (23±1℃,RH70=10) |
1.0314 24.7 13.6 24.114 Final setting 386 |
1.0982 24.5 11.20 24.970 Final setting 350 |
Note: (1) Both catalyst PH are 7; (2) both the appearance of transparent liquid are yellow, no irritating odor; (3) storage stability are: 10 cycles of qualified, quality store airtight at room temperature constant; (4) catalytic properties are: hardening slurry wellfind more hydrated crystals.
2.2 The product performance
the main properties of Xile DPS meets the standard of JC/T1018-2006, DBJ01-54-2000
. To further understand the quality of the product case, Conducted a comparative test with American waterproofing agents, see the results in Table 2.
Table 2 Performance parameters of the Xile DPS compares with American
Performance parameters |
Xile DPS |
American |
Viscosity (23 ± Density (23 ± Surface tension (mN / m) Gel time (min) (23±1℃,RH70=10) |
10.40 1.09 24.381 Final setting 386 |
10.44 1.085 25.675 Final setting 350 |
Note: (1) Both PH value are 12; (2) the appearance of both are colorlesstransparent, odorless, nonflammable, non-toxic water-based solution; (3) permeability are: 24h penetration depth greater than
Form Table 2 test results: the surface tension of liquid, appearance, density, PH, permeability, storage stabilityother properties of both are nearly the same; gel time also are similar.
3 Features
3.1Penetration function
Xile DPS has a strong penetration function, mainly due to the introduction of various active catalyst additivespenetrant composition. After the application of verification proving that a variety use of new additive auxiliarycatalyst can be formulated a low surface tension, good permeabilitystorage stability of waterproofing products.
the penetration of Xile DPS in cement mortar, concrete structures is along the capillary channelenter the internal connected micro-cracks. To further understand the relationship between the penetration function of waterproofingthe density of structures , Comparison test conducted impermeability by brushing Xile DPS samplesuncoated blank basis samples.
Impermeability comparative test by GBJ 82-85 " Concrete impermeability test methods ", At first on the uncoated blank specimen take a impermeability test until the seepage to measure impermeability pressure, After unloading mode , specimen face is brushed 3 times with Xile DPS, re-install conservation model for impermeability test after 3d curing to determine impermeability pressure, Comparison of calculated percentage of impermeability pressure,
The results shown in Table 3
Table 3.Comparative impermeability of Xile DPS
Specimen number |
seepage pressure (MPa) |
anti-Chung pressure increase (%) | |
Blank reference specimen |
brushed Xile DPS specimen | ||
1 2 3 4 5 6 |
0.4 0.5 0.6 0.7 1.0 1.3 |
0.8 0.9 1.2 1.2 1.3 1.6 |
100 80 100 71 30 23 |
Impermeability of the Table 3 Comparison of experimental results can be seen after brushing Xile DPS, the impermeability of concrete specimen pressure increased significantly, whereas the rate of increasethe impermeability of the reference specimen. No. 1-4 impermeability pressure low (1MPa below) benchmark test specimen, increased the magnitude of the ratio of 71% to 100%; No. 5-6 impermeability pressure above the benchmark in 1MPa specimens, although the impermeability pressure increased to 1.3 ~ 1.6MPa, but the value increased only by the degree of 23% to 30%. This shows that the use of Xile DPS is more effective where structures is in the worse dense foundation level.
,
3.2 Sealcompacting function
Xile DPS penetrated form the surface the internal structure of cement mortar concrete
Immediately with the cement hydration process produced Ca (OH) 2 reaction of water-insolublehas a certain strength of the silica gel crystals, precipitation of other alkali substances,
forming a permanent seal with the structures blend waterproofing.
3.2. Close solid feature
Xile DPS is penetrated by the surface structure of cement mortar concrete internally, immediately with the cement hydration process produced Ca (OH) 2 reaction, Generation does not dissolve in waterhas a certain strength of the silica gel crystals, precipitation of other alkali material to form a permanent seal waterproofing with the structures.
Cement mortar, concrete structures by water soaking wet, the internal Ca (OH) 2 is gradually precipitated, the precipitation amount is growing with the time moisture increasing, which provide the the gel reaction conditions for waterproofing. condensation performance in the gel time was found during testing, with the Ca (OH) 2 concentration increases, the time of waterproofing gel initial setting is corresponding shorten, which can show that to master control of Ca (OH) 2 concentration on the improvement to improve sealing function is very important. In construction applications, has taken to extend the base surface moisture soaking timethe old concrete (mortar)
To further learn more the effect of the waterproofing agent of Xile DPS in the mixture of cement hydration process on the mineral composition of cement, No. 425 #dinary portland cement use made of the standard grinding,, the grinding is observed cement facies under the polarizing microscope, and with uncoated cement grinding contrast. It is observed that specimen brushing Xile DPS, a large number of gels within the gap is filled, it is clear to see more of the silica gel crystals, the internalganization of dense, blank basis samples uncoated on the test is relatively large interconnected pores, silica gel crystals rare inside. Thus, Xile DPS can accelerate cement hardening, resulting in gel, cement block inside gap, to improveenhance the sealing cement structure, permeability, water resistance.
Cement facies described indicate in Figure 1.
To learn more about Xile DPS waterproofing agent in the hydration process of cement mixing material on the mineral composition of cement, use is made of 425 #dinary portland cement standard grinding, the grinding on the polarizing microscope cement facies observed,with the uncoated cement grinding contrast. Observed : brushing Xile DPS on grinding, a large number of gels within is filled, it is clear to see more of the silica gel crystals, the internal compactganization,uncoated blank test grinding within the relatively large interconnected pores, silica gel crystals rare. Thus, Xile DPS can accelerate cement hardening, gel formation, cement block inside gap, to improveenhance the sealing cement structure, permeability, water resistance. Lithofacies depicted in Figure 1.
(a) (b)
Figure 1 coateduncoated Xile DPS cement facies (× 450 single-polarized light)
(A) uncoated Xile DPS (b) coated Xile DPS
Xile DPS forms the new silicon gel crystal while penetrating Internal structures, with the moisture conservation, ground surface will separate out a white precipitate. This means that the waterproofing penetrated deeper base plane, perfect gel reaction,harmful potassium, sodium oxide has been precipitated.
3.3 Reinforcing function
Cement mortar, concrete structures treated after brushing Xile DPS,, produces a new gelsilicate, to form a seal layer to promote cement hydrationfurther improved to increase strength. Therefore, the application of Xile DPS in restoration for old concrete structures always has a reinforcing function.
Reinforced by the Xile DPS after repair , the concrete strength meets the design requirements,achieved satisfactory results.
4 Durability
4.1 The anti-wind erosion carbonation
Anti-wind erosion carbonation performance testing in the laboratory, at first production 2 groups, line of
Figure 2 State of blank piece of Figure 3 .State of the piece coated
carbon benchmark test Xile DPS carbon benchmark test
4.2 Anti-corrosion
Xile DPS has some corrosion resistance. Both blank concrete specimens treated Xile DPS three timesuntreated specimens are at strong acidic medium solution (PH value <1), soaked for 6 months, take out to test their physicalmechanical properties, to found that the bendingthe compressive strength of soaking handle specimen is better than the untreated samples after soaking, the results shown in Table 4, because one other Xile DPS increases density of the surface concrete (mortar) treated , closed the channel of micro-gaps intruded by media; the other alkaline silicate material itself is anti-corrosive. However, the view of anti-corrosion mechanism, the experimental resultspracticability, it is more sui for the corrosion of acid gas medium,PH value of 4 more (below the middle grade corrosion of the blank concrete) the corrosion for acidic action of parts under the corrosive water.
Table 4 Strength of the treated compared with untreated samples increased rate%
Medium |
2% HCL |
5% HCL |
2% HNO 3 |
5% HNO 3 |
Bending to improve Compressive strength increased |
6.6~14.3 28.7~69.2 |
32.6~39.1 4.8~40 |
20.1~30.5 9.5~13.4 |
14.6~23.9 14.4~23.5 |
5 Conclusion
Xile DPS is a green environmental protection, structural reinforcement, self-repair, multi-performance, simple to apply the unique properties of waterproofing materials, have been widely used in various types of concrete structures, waterproofing, corrosion protection, good effect, significant socialeconomic benefits.
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