diff --git a/modin/pandas/utils.py b/modin/pandas/utils.py
index 2193c4858a9..e461b0ac7a0 100644
--- a/modin/pandas/utils.py
+++ b/modin/pandas/utils.py
@@ -408,8 +408,13 @@ def _create_blocks_helper(df, npartitions, axis):
 @ray.remote
 def _blocks_to_col(*partition):
     if len(partition):
-        return pandas.concat(partition, axis=0, copy=False)\
-            .reset_index(drop=True)
+        df = pandas.DataFrame(np.concatenate(partition, axis=0))
+
+        # heterogenous types
+        if len(np.unique(partition[0].dtypes.values)) > 1:
+            df = df.astype(partition[0].dtypes, copy=False)
+
+        return df
     else:
         return pandas.Series()