What Factors Will Affect The Service Life Of Terrazzo Flooring in Shanghai

The factors that affect the service life of terrazzo flooring in Shanghai are as follows:

Material quality:
Aggregate properties: Quartz aggregates (such as white stones, SiO ₂ ≥ 90%, Mohs hardness 7) have 3-5 times higher wear resistance and more than 10 times higher acid corrosion resistance than limestone aggregates (CaCO ∝, Mohs hardness 3). For example, a certain food workshop uses limestone aggregates, which have a stone detachment rate of over 40% due to acidic soup corrosion in 3 years, while quartz aggregates only wear down 1-2mm in the same scenario.
Particle size distribution: Particles with a size<3mm are easily worn through, while those with a size>10mm are prone to hollowing due to their own weight; The ideal gradation is 3-8mm mixed (porosity<30%), which can improve the overall strength by 20% -30%.
Impurity content: Stones containing pyrite (FeS ₂) will oxidize and expand when exposed to water, which may cause surface cracking in 3-5 years. For every 1% increase in impurity rate, the risk of cracking increases by 15%.
Performance of bonding material: Poor quality water reducing agents (containing chloride ions>0.1%) can accelerate steel corrosion and may cause structural damage within 10 years; High quality polymer lotion (such as VAE) can reduce the shrinkage by 40% -60%.
Construction quality:
Grassroots treatment: Poor cleaning of the grassroots (floating ash>5g/㎡) or uneven application of interface agent can lead to excessive hollowing rate. For every 1% increase in hollow area, the risk of damage within 5 years increases by 8%, typically manifested as corner warping and stone detachment.
Flatness control: Check with a 2m ruler. When the error is greater than 3mm, local load concentration will accelerate the wear rate by 25% -40%, especially at the threshold and channel corners where wear pits are prone to form.
Thickness design: When the design thickness is less than 15mm, the exposed depth of the stone after grinding is less than 3mm, and the wear resistance life is shortened by more than 50%; In industrial scenarios, it is necessary to ensure a thickness of ≥ 25mm and a stone burial depth of ≥ 15mm.
Bubble control: Bubble rate>5% will lead to an increase in internal porosity, a decrease in impact resistance by 30% -50%, and a tendency for "stone meat separation" under heavy loads.
Grinding accuracy: When the final mesh size is less than 800 mesh, the surface roughness Ra is greater than 6.3 μ m. Daily dust infiltration will accelerate wear, and the annual wear amount is 0.2-0.5mm higher than that of a 1500 mesh surface.
Usage environment:
Mechanical load: When the weight of the falling object is greater than 5kg and the drop is greater than 1m, it may cause local fragmentation, with more than 5 impacts per square meter per year, shortening the service life by 10% -15%; When the quartz sand content in the ground dust is greater than 30%, the walking friction is equivalent to "sandpaper polishing", and the annual wear increases by 0.5-1mm, which is 2-3 times that of a dust-free environment.
Wet environment: Long term humidity (moisture content>8%) can accelerate cement-based carbonation, and for every 1 decrease in pH value, the corrosion rate of steel bars increases by 10 times; Acidic environment (pH<4) results in an annual corrosion depth of 0.3-0.5mm.
Temperature changes: In areas with a temperature difference greater than 30 ℃ (such as cold storage entrances and exits), there are over 50 cycles of thermal expansion and contraction per year, and the incidence of cracks is 2-3 times higher than in normal temperature environments. The average annual expansion of crack width is 0.1-0.3mm.

Chemical corrosion: Long term penetration of engine oil and solvents will soften the resin base. For every 1 square meter of contact area, the strength will decrease by 15% -20% within 5 years, and it is easy to cause flaking.
Post maintenance:
Initial maintenance: If the moisture is not maintained within 7 days after construction, the shrinkage rate increases by 50%, and the initial crack occurrence rate increases from 5% to 20% -30%, becoming the source of later damage.
Cleaning method: Use steel wire balls and strong acid cleaning agents. Each cleaning results in surface wear of 0.01-0.05mm, and the annual cumulative wear can reach 0.1-0.6mm, which is equivalent to 1-3 times normal wear.
Sealing treatment: The sealing agent is not applied regularly (recommended once a year), and the surface porosity increases from 5% to 15% -20%. The penetration depth of pollutants increases by 3-5 times, accelerating the loosening of aggregates.
Refurbishment and maintenance: When the surface wear is greater than 3mm and no grinding or refurbishment is carried out, the remaining aggregate anchoring depth is insufficient, and the subsequent wear rate increases by more than twice, which may reach the end of its service life within 2-3 years.